Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Science & Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 09-01-2009, 09:27 PM #33
Tabish's Avatar
Class 2M Laser
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Tabish Tabish is offline
Class 2M Laser
Tabish's Avatar
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Default Re: Black Holes???

"As this energy crosses the event horizon, it reverts back to the dominant force of dark energy."

Starwars?? rofl


Tabish is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 09-01-2009, 09:45 PM #34
boosted_4cyl's Avatar
Class 2M Laser
 
Join Date: Apr 2009
Location: chicago
Posts: 592
Rep Power: 24
boosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud of
Send a message via Yahoo to boosted_4cyl
boosted_4cyl boosted_4cyl is offline
Class 2M Laser
boosted_4cyl's Avatar
 
Join Date: Apr 2009
Location: chicago
Posts: 592
Rep Power: 24
boosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud ofboosted_4cyl has much to be proud of
Send a message via Yahoo to boosted_4cyl
Default Re: Black Holes???

Quote:
Originally Posted by 33846 View Post
I think our brains need to evolve much more for for us to completely understand, but until then we should try to understand as much as we can.

Devin.
So no more watching american idol and football? Dammit. Im going to go invent the antimatter black laser now
boosted_4cyl is offline   Reply With Quote
Old 09-02-2009, 12:06 AM #35
Mohrenberg's Avatar
Class 4 Laser
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Mohrenberg Mohrenberg is offline
Class 4 Laser
Mohrenberg's Avatar
 
Join Date: Aug 2008
Location: Green Ridge,MO USA
Posts: 6,927
Rep Power: 557
Mohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond reputeMohrenberg has a reputation beyond repute
Send a message via Skype™ to Mohrenberg
Default Re: Black Holes???

can someone answer this...it's driving me crazy...

ok, first off the theory goes that nothing can travel faster than light because it's mass would become infinite correct?

and, black holes are black because the gravitational pull is so great that not even light can escape it.

The thing that boggles my mind is, when i was in grade school we would have these math word problems, and they would go something like "if your in a boat at 5mph travel upstream, and the current is traveling at 3mph, how fast are you traveling?" which is 2mph.
i thinking of the gravitational pull in this way, like the current of a river, working against light which is traveling at like 180,000 (don't remember exact)miles a second. so for it to pull light in, the opposite force must be stronger.

so imagine we were able to acheive 99.9% the speed of light, say 179,000 miles a second and we shot it at a black hole, wouldn't it acheive the speed of light or greater by the time it impacted the black hole???
__________________

Http://www.Budgetbeams.com
Mohrenberg is offline   Reply With Quote
Old 09-02-2009, 01:16 AM #36
Tabish's Avatar
Class 2M Laser
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Tabish Tabish is offline
Class 2M Laser
Tabish's Avatar
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Default Re: Black Holes???

Quote:
Originally Posted by Mohrenberg View Post
can someone answer this...it's driving me crazy...

ok, first off the theory goes that nothing can travel faster than light because it's mass would become infinite correct?

and, black holes are black because the gravitational pull is so great that not even light can escape it.

The thing that boggles my mind is, when i was in grade school we would have these math word problems, and they would go something like "if your in a boat at 5mph travel upstream, and the current is traveling at 3mph, how fast are you traveling?" which is 2mph.
i thinking of the gravitational pull in this way, like the current of a river, working against light which is traveling at like 180,000 (don't remember exact)miles a second. so for it to pull light in, the opposite force must be stronger.

so imagine we were able to acheive 99.9% the speed of light, say 179,000 miles a second and we shot it at a black hole, wouldn't it acheive the speed of light or greater by the time it impacted the black hole???
Hmm good question lol.
The thing is no object can reach the speed of light, because the energy required would be infinite.

So as you get closer and closer to the black hole, i assume the speed would be like

99%
99.9%
99.99%
99.999%
...............
(speed of light)

You would keep approaching it(speed of light) but never really get there because a black holes gravitational pull doesn't have infinite energy. (really it doesn't lol)

Edit: I dont remember exactly, but the exact equation is something like:

E = (mc^2) / square root(1 - v^2 / c^2)

so normally you use just e = mc^2 since v(velocity) is pretty much 0 compared to speed of light, so square root(1 - v^2 / c^2) is basically 1

However when v = c
square root(1 - v^2 / c^2) becomes 0

Then, E = mc^2 / 0
so e = infinite when speed is the speed of light


Umm dunno if that made any sense haha

Last edited by Tabish; 09-02-2009 at 01:22 AM.
Tabish is offline   Reply With Quote
Old 09-02-2009, 02:28 AM #37
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Black Holes???

Quote:
Originally Posted by Tabish View Post
The thing is no object can reach the speed of light, because the energy required would be infinite.

So as you get closer and closer to the black hole, i assume the speed would be like

99%
99.9%
99.99%
99.999%
...............
(speed of light)

You would keep approaching it(speed of light) but never really get there because a black holes gravitational pull doesn't have infinite energy. (really it doesn't lol)
Just a thought -- the problem I see with the speed of light being a "Constant" is that in order to ascertain a "speed" the speed must be measured against some other point. Whatever we are measuring must be going toward something or going away from something (simplified).

However, "things" don't just sit there to be measured against. If particle "A" is traveling "east" at .75 the speed of light and particle "B" is traveling "west" at .75 the speed of light, aren't they traveling at 1.5 the speed of light if measured against each other?

Of course observers on either "A" or "B" would never know anything about the other because the "information" would never reach the other. However, if a third observer was at a point in the "north", wouldn't that observer see objects traveling away from each other at more than the speed of light?

Peace,
dave
daguin is offline   Reply With Quote
Old 09-02-2009, 10:16 AM #38
Tabish's Avatar
Class 2M Laser
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Tabish Tabish is offline
Class 2M Laser
Tabish's Avatar
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Default Re: Black Holes???

Quote:
Originally Posted by daguin View Post
Just a thought -- the problem I see with the speed of light being a "Constant" is that in order to ascertain a "speed" the speed must be measured against some other point. Whatever we are measuring must be going toward something or going away from something (simplified).

However, "things" don't just sit there to be measured against. If particle "A" is traveling "east" at .75 the speed of light and particle "B" is traveling "west" at .75 the speed of light, aren't they traveling at 1.5 the speed of light if measured against each other?

Of course observers on either "A" or "B" would never know anything about the other because the "information" would never reach the other. However, if a third observer was at a point in the "north", wouldn't that observer see objects traveling away from each other at more than the speed of light?

Peace,
dave
Einstein's theory of special relativity.....
You are right. It's all about the frame of reference.

But back to the black hole question.

The thing is, all sorts of weird things happen when approaching near light speed. Such as:Time dilation, Length contraction .......
I don't want to start a full blown physics thread haha. My head hurts thinking about it.
Tabish is offline   Reply With Quote
Old 09-02-2009, 10:24 AM #39
millirad's Avatar
Class 3B Laser
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
millirad millirad is offline
Class 3B Laser
millirad's Avatar
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
Default Re: Black Holes???

Ahaa! Dave has just broken the fabric of space. It looks like some difficult stuff to figure out there. Or maybe an observer isn't able to look at both objects simultaneously(ala Schrödinger's cat problem).
__________________
Greenie - 100mw in diy aluminum host
650nm - 260mw in MXDL host with brass heatsink
650nm - 325mw in stainless Raygun host. The dot is so bright it's
PINK/ORANGE!
Thanks Jay! Thanks Drew! Thanks Larry! Thanks Glenn! Thanks Dave!

Pink - 500mW (white w/red , ok not till later)
Please don't dazzle aircraft! You wouldn't hit someone in the face normally would you?
Home of the stainless RAYGUN !
millirad is offline   Reply With Quote
Old 09-02-2009, 10:30 AM #40
Tabish's Avatar
Class 2M Laser
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Tabish Tabish is offline
Class 2M Laser
Tabish's Avatar
 
Join Date: Aug 2009
Posts: 690
Rep Power: 20
Tabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud ofTabish has much to be proud of
Default Re: Black Holes???

"However, if a third observer was at a point in the "north", wouldn't that observer see objects traveling away from each other at more than the speed of light?"

Good question.

Hmmm. I'm no physicist but, I think this would involve the Relativistic doppler effect.

Basically if you are seeing ship A moving left and B moving right (say they have extremely bright green leds around them)
When the light comes back to you, it will be red-shifted. I mean, the colors wavelength would be lower. So you wouldnt see green, but might see red/yellow instead.

Last edited by Tabish; 09-02-2009 at 10:33 AM.
Tabish is offline   Reply With Quote
Old 09-03-2009, 08:42 AM #41
Byrnz93's Avatar
Class 2 Laser
 
Join Date: Jul 2009
Location: Brisbane, Queensland, Australia
Posts: 490
Rep Power: 20
Byrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud of
Byrnz93 Byrnz93 is offline
Class 2 Laser
Byrnz93's Avatar
 
Join Date: Jul 2009
Location: Brisbane, Queensland, Australia
Posts: 490
Rep Power: 20
Byrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud ofByrnz93 has much to be proud of
Default Re: Black Holes???

Quote:
Originally Posted by Tabish View Post
"However, if a third observer was at a point in the "north", wouldn't that observer see objects traveling away from each other at more than the speed of light?"

Good question.

Hmmm. I'm no physicist but, I think this would involve the Relativistic doppler effect.

Basically if you are seeing ship A moving left and B moving right (say they have extremely bright green leds around them)
When the light comes back to you, it will be red-shifted. I mean, the colors wavelength would be lower. So you wouldnt see green, but might see red/yellow instead.
Yeah i think it might display that red-shift effect, but im not too sure about whether the red-shift effect would apply to ship A and ship B, they would have to be travelling quite fast away from you wouldnt they?

I just read through this thread and I was left astounded by how much these guys know about physics, it's just truly amazing.
Byrnz93 is offline   Reply With Quote
Old 09-03-2009, 09:27 AM #42
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: Black Holes???

Uhm, according with relativity theory, anything is relative (lol), ok, seriously, if is true that in this continuum the mass increase at the increasing of the light speed, becoming infinite at reaching this speed, there cannot be anything that go faster than light, in the absolute coordinates environment, just cause you can't accelerate an infinite mass without use an infinite energy (and also cause, if the relative time shrink to zero, you,literally, don't have the time for perform any operation, but this is a different story )

Then, you can have two objects that travel, as example, one against the other, at RELATIVE speed greater than light, but, first, this don't mean that these objects traver at speeds greater than light in the ABSOLUTE environment where you are, and, second, that relatively to any of the two objects, the other appears just at the speed of the light, also if the combined speeds are greater .....and, please, don't ask me to explain this ..... when i was student, we had a bet with our physic prof, about that, and in a group, tried to demonstrate this exact problem NOT using Einstein's equations ..... we was 11 peoples, some of them was very VERY much better than me in math (and i mean A LOT better, one of them actually work as full-time math researcher, and as passtime, instead crosswords, he do stocastic correlations of transfinite sequences, anything they are ), and we give up after a month and half of trials, with only half of the work done, something like 7 notebooks of self-contradicting differential equations, and a big collective headache



Quote:
Originally Posted by laser83 View Post
String theory is even stranger.
No, strings are easy to understand ..... i use them all the days, in my shoes .... (sorry, just can't resist )
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 09-03-2009, 11:42 AM #43
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Black Holes???

Using the maths and assumptions that were used to prove Einstein's theory, to disprove it, would be an excersice in futility.

We already have experiments in which we can change the speed of light (we slow it down). We have experiments where light is virtually stopped. We have experiments in which we can have other things surpass the speed of the slowed down light. In quantum theory, we have experiments in which time and space have no relevance.

The view that the "speed of light" is either constant and/or some sort of upper limit is beginning to fail. Not only are some of his basic assumptions failing, but they fail completely at the quantum level.

Einstein had a good run. His work will forever remain important. However, only by stepping outside his beliefs will we cause the next paradigm shift to occur.

Listen to your professors. They are the ones grading you. Learn Einstein. Most of our present day applications are based in his beliefs. Treat what you are told as Truth. You need the degree. However, keep your mind alert for the "chinks" in his wall of absolutes. It is through one of them that we will move into the next paradigm.

Peace,
dave
daguin is offline   Reply With Quote
Old 09-03-2009, 12:38 PM #44
bobhaha's Avatar
Class 3B Laser
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
bobhaha bobhaha is offline
Class 3B Laser
bobhaha's Avatar
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
Default Re: Black Holes???

Quote:
The view that the "speed of light" is either constant and/or some sort of upper limit is beginning to fail. Not only are some of his basic assumptions failing, but they fail completely at the quantum level.
This is true, but you have to remember, that speed of light is relative is "all" situations! think of the thought experiment, where a lady is on a train moving at the speed of light, and she looks into a mirror, will she see her self in the mirror, or will the light never get back to her eyes? well answer is, speed of light is constant and she will see her self, which is not relitive to her velosity.

another way to picture this is, a boy skate boarding and throwing an egg at a wall. his inital velocity was 10m/h but when he threw the egg he gave the egg an extra 20m/h, resulting in a 30m/h impact with the egg and wall. But this doesnt happen with light. If the same boy was skating down a massive hill, and reached the speed of light, then took out his laser, the light of the laser would travel away from him at the speed of light, not 2 times the speed of light. So what does that all mean, it means the speed of light is not relative to anything, but rather moves at a constant speed, c, which we believe is the upper limits of some sort. If we go back to the energy vs velocity equations we see that mass is a contrubuting factor and thus we can conclude that to travel at the speed of light we must have 0 mass, not even photons travel at the speed of light, they have a mas around 1/2000th of an electron. So as we see the speed of light is now our boundry or set goal to accoomplish. The graviton (the particle they want to find using the particle accelerator) will help solve these problems, since it is one of a few particles that are directly responsible for matter having mass.

So in reality, light is still a constant, it leaves a body at the speed of light no matter the speed at which the body is moving. But in the quantum world the rules are tipped upside down! we see electrons, apperaring and disappearing instantly, we see energy transformed in a spilt second, resulting in unforseen events and finally we see how transmutation has changed the way we think about the quantum world, but ofcorse there is much much more!

PS: BTW I'm 17 so if my info is completely wrong I apploigise, I have just learnt all this info and really excited to share my knowledge. But I hope that clears some stuff up!

-Adrian
__________________
Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!

Last edited by bobhaha; 09-03-2009 at 12:51 PM.
bobhaha is offline   Reply With Quote
Old 09-03-2009, 01:00 PM #45
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Black Holes???

Quote:
Originally Posted by bobhaha View Post
This is true, but you have to remember, that speed of light is relative is "all" situations! think of the thought experiment, where a lady is on a train moving at the speed of light, and see looks into a mirror, will she see her self in the mirror, or will the light never get back to her eyes? well answer is, speed of light is constant and she will see her self, which is not relitive to her velosity.

another way to picture this is, a boy skate boarding and throwing an egg at a wall. his inital velocity was 10m/h but when he threw the egg he gave the egg an extra 20m/h, resulting in a 30m/h impact with the egg and wall. But this doesnt happen with light. If the same boy was skating down a massive hill, and reached the speed of light, then took out his laser, the light of the laser would travel away from him at the speed of light, not 2 times the speed of light. So what does that all mean, it means the speed of light is not relative to anything.

so in reality, light is still a constant, it leaves a body at the speed of light no matter the speed at which the body is moving. But in the quantum world the rules are tipped upside down!

PS: If my info is completely wrong I apploigise, I have just learnt all this info and really excited to share my knowledge. But I hope that clears some stuff up!

-Adrian
In your defense, you expose the weakness. What would the woman see in the mirror? We have no idea. No one has ever observed this. The "proof" is simply a restatement of the assumption.

If the speed is "constant" how can we slow it down?

If the theory cannot explain physics at the quantum level then it is flawed.

If the goal of any testing is to either prove or disprove a theory, then the results are suspect. Don't try to prove or disprove it. Strive to understand it. Seek to test it. (After you give the professor the answer that he/she is looking for so you get a good grade )

Peace,
dave
daguin is offline   Reply With Quote
Old 09-03-2009, 03:29 PM #46
Meatball's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Meatball Meatball is offline
Class 3B Laser
Meatball's Avatar
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Default Re: Black Holes???

I heard that the speed of light as we know it, is more commonly observed in vacuums. Basic wave theory states, that when a wave enters a new medium that is more dense than the one it was previously traveling through, the wave will travel slower. I don't know how much electromagnetic waves are affected by medium transitions, but heres and interesting article about what some scientists have already done to slow the speed of light.

Researchers slow light to a "crawl," photonic computers imminent
__________________
FIAT LUX

(\__/)
(='.'=)
(")_(")
Meatball is offline   Reply With Quote
Old 09-03-2009, 04:01 PM #47
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: Black Holes???

Yes, but they slowed down the light passing it in a different medium ..... C is related to light speed in the void (and in any other medium different than void, light always slow down )

By the way, i was curious about to know how much energy they shooted in that crystal ..... probably, single photons ..... cause, after all, you can't cheat too much natural laws without a payback ..... like ..... take as example a 100mW laser (guess why ? LOL), and slow it down of the same amount (51.724 times, according with the data they say) ..... this mean that in the travel inside the crystal, when your laser beam have a speed of 5,8Km/S, have also an energy of 5.172 Watt, more or less ( enough to melt any non-100% transparent crystals, i guess )

..... pity only that, as usually light do, when it come out from the crystal, photons regain their usual speed
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 09-03-2009, 05:27 PM #48
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Black Holes???

Quote:
Originally Posted by HIMNL9 View Post
Yes, but they slowed down the light passing it in a different medium ..... C is related to light speed in the void (and in any other medium different than void, light always slow down )

..... pity only that, as usually light do, when it come out from the crystal, photons regain their usual speed
The main point I was trying to make is still valid here. It used to be also believed that the speed of light was "constant" no matter what medium it was in. The belief was that you could "bounce" it around in a medium (so that its exit would be delayed), but all of the bouncing light in the medium would still travel at the speed of light. Now we know that we can, indeed, slow it down. It is not "constant."

The experiments slowing down light have proven that it is not a "constant." Yet in most schools of thought it is still being treated as one. If we could be wrong about the speed being "constant," could we not also be wrong about the upper limit of travel being "the speed of light"? Also, if it can be violated in the quantum state, why not in the micro and/or macro states?

It is also generally accepted in cosmologic science that the particles escaping the "big bang" traveled in excess of the speed of light in the beginning. It is the only way to explain the distances achieved today. Physicists often explain this by saying that the physical laws had not "appeared" yet. This is the same argument that says it is useless to contemplate reality BEFORE the big bang because the laws of physics were different then.

If the laws could be different before and at the beginning, I ask, "Why can't they be different now?" It is the slavish adherence to the belief that the speed of light is inviolate, that stops much work being done. In order to move beyond it the assumption must be that we can exceed this limit. We only need to figure out how to do it.

Peace,
dave
daguin is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 07:34 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC