FAQ  Donate 
Members List  
Calendar  
Search  
Today's Posts 
Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the Laser Company Top Sites List. The link will open in a new window for your convenience. 

 LinkBack  Thread Tools  Display Modes 
07022010, 05:50 PM  #17  
 
Class 3R Laser Join Date: Aug 2007
Posts: 2,045
Rep Power: 788 
Also, I can't read the title of this thread without thinking of Freddie Mercury singing "I'm traveling at the speed of light"  
07022010, 07:29 PM  #18  
 
Class 2 Laser Join Date: Jun 2010 Location: Northern Ireland
Posts: 356
Rep Power: 12  Quote:
__________________ Just starting off my collection. Currently have: 150mW 405nm from Olike *outputting 156mW quite stable* Jayrob SS 18650 kit, A140 diode at 1A putting out 900mW 100mW 532nm from dealextreme *broke* 500mW 532nm from Olike *lense dmg? down to 150mW with scatter* 200mW waterproof 650nm from Olike *outputting 210mW quite stable* Plan to have soon: 1W 455nm from wicked lasers (ofc) 01010000011000010111001101110100011000010010000001 10111000100000011100110110000101110101011000110110 01010011101000100000011010010111010001110011001000 00011000010110110101100010011010010110011101110101 01101111011101010111001100100001  
07032010, 01:01 AM  #19  
 
Class 3B Laser 
i never stated in vaccum. also space is not clean. there is microscopic floating debris. this would creat a "drag" if you will. michael
__________________ IN A CONSTANT STATE OF PICNIC I AM THE STATUS QUO ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS LASER POINTER FORUM ETIQUETTE for pot modding facts click below http://laserpointerforums.com/f51/potmoddingfaqs40510.html  
07032010, 01:10 AM  #20  
 
Class 3R Laser Join Date: Aug 2007
Posts: 2,045
Rep Power: 788  Quote:
Even in a perfect vacuum (which doesn't technically exist in reality, you're right, but this is all a thought experiment, so we're allowed), it still won't work, and not because of any frictional or drag force. We can approach the speed of light, but not reach it. If I'm not mistaken, the fastest "objects" we've every produced are protons in the LHC, and even those are still a full 3 m/s slower than the speed of light.  
07062010, 08:26 PM  #21  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0 
Any idea that has anything moving at the speed of light other than photons themselves is irrelivant. It CANNOT happen, so it should never be considered. If you had a train moving at 99% the speed of light, and then you have someone on the train running forward at 2% the speed of light, you would see his time slowed down just enough so that relitive to you, he was traveling at just under the speed of light. Its called time dilation. Time will ALWAYS slow down for somthing you see traveling at close to the speed of light just enough so that you view it traveling at under the speed of light.  
07062010, 09:11 PM  #22  
 
Class 3R Laser Join Date: Oct 2009 Location: Tulsa, Oklahoma
Posts: 1,191
Rep Power: 58 
@Leapold; IMO, it's good to keep an open mind. Science is always moving forward, showing that nothing is impossible. In 1950 you'd be looked at funny for mentioning a 1W blue laser that fits in your hand now thousands of collectors, buisinesses, and intoxicated idiots are buying them for 200$. You might be right, you might be crazy, please don't state opinion as fact.
__________________ _~Cale ~10mW Focusable OLike (405nm) ~60mW CNI Clone (405nm) ~1W Spyder III, Arctic Series (445nm) ~5mW Radioshack Pointer (532nm) ~55mW Viper (532nm) ~200mW Skylasers Portable (532nm) ~5mW Atlasnova (635nm) ~200mW New Style Dilda (650nm) ~5mW DX pointer (650nm)  
07062010, 09:14 PM  #23  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0 
@wood I'm quite sure everything i stated is fact. If not, please correct me.  
07062010, 09:22 PM  #24  
 
Class 2 Laser Join Date: Jun 2010 Location: Northern Ireland
Posts: 356
Rep Power: 12 
im pretty sure that, despite time dilation, that the speed of an object must remain in the constant factor in distortion due to speed, otherwise it becomes meaningless. so if you see an object going fast, time dilation wont actually slow down its speed, or suddenly it isnt going as fast. i think in the case you described, the object would appear to not be going as fast to you because length contraction will reduce the distance it is covering in unit time. edit: actually that probably is just an alternative way to the same conclusion lol
__________________ Just starting off my collection. Currently have: 150mW 405nm from Olike *outputting 156mW quite stable* Jayrob SS 18650 kit, A140 diode at 1A putting out 900mW 100mW 532nm from dealextreme *broke* 500mW 532nm from Olike *lense dmg? down to 150mW with scatter* 200mW waterproof 650nm from Olike *outputting 210mW quite stable* Plan to have soon: 1W 455nm from wicked lasers (ofc) 01010000011000010111001101110100011000010010000001 10111000100000011100110110000101110101011000110110 01010011101000100000011010010111010001110011001000 00011000010110110101100010011010010110011101110101 01101111011101010111001100100001 Last edited by Fonduman; 07062010 at 09:24 PM.  
07062010, 10:13 PM  #25  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0 
Anything that can be measured will adjust so that the object is not exceeding the speed of light. Whether it be length, time, mass, w/e. The traveler will still see himself going at the same speed, but when i see him, his time is slowed down. So therefor his speed is slowed down.
 
07062010, 10:17 PM  #26  
 
Class 3B Laser  Quote:
this is where imagination comes into play.
__________________ IN A CONSTANT STATE OF PICNIC I AM THE STATUS QUO ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS LASER POINTER FORUM ETIQUETTE for pot modding facts click below http://laserpointerforums.com/f51/potmoddingfaqs40510.html  
07072010, 04:49 AM  #27  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0  Physical Reality  Mathematics of Relativity This is a link to the derivation of the time dilation and length contraction equations, and why mass increases with velocity and more. It's a great thing when you derive these for yourself and prove facts with simple observations using mathematics. If you find a flaw in the mathematics or logic behind these equations, please point it out to me. Einstein, Albert. 1920. Relativity: The Special and General Theory Also, a link to Einstein's book, 'Relativity, The Special and General Theory.' An amazing book that will tell you everything you need to know about Relativity.  
07072010, 04:49 AM  #28  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0  Physical Reality  Mathematics of Relativity This is a link to the derivation of the time dilation and length contraction equations, and why mass increases with velocity and more. It's a great thing when you derive these for yourself and prove facts with simple observations using mathematics. If you find a flaw in the mathematics or logic behind these equations, please point it out to me. Einstein, Albert. 1920. Relativity: The Special and General Theory Also, a link to Einstein's book, 'Relativity, The Special and General Theory.' An amazing book that will tell you everything you need to know about Relativity.  
07072010, 06:51 AM  #29  
 
Class 2M Laser Join Date: Jun 2010
Posts: 609
Rep Power: 28 
One of the benefits of traveling greater than the speed of lights is that red traffic signals would not appear red. Something else to consider, we know what the speed of sound is, but what is the sound of speed?  
07072010, 09:51 AM  #30  
 
Class 3B Laser Join Date: Mar 2006 Location: Utah
Posts: 4,476
Rep Power: 282326 
Ok what happens if you have two objects going in opposite directions at near the speed of light? Will they effectively be traveling apart faster than the speed of light?
__________________  
07072010, 03:53 PM  #31  
 
Member Join Date: Jun 2010
Posts: 36
Rep Power: 0 
Imagine we both have clocks. I am traveling west at 99% the speed of light relative to a 3rd person right in the middle of us. You are going east at 99% the speed of light relative to this person as well. This person will view both of us doing just as i stated, but when i turn around and look at you, i will see your clock running extremely slowly. That way, you will only be able to travel infinitely close to the speed of light. The closer and closer you get to the speed of light relative to me, the slower your clock will run forcing you to obey the 300,000,000 m/s speed limit. Think of it this way, you may be going 198% the speed of light if time dilation did not happen. But since once second for me will be .1 seconds 'i did not calculate this' for you, you will only be able to go so fast relative to me. Sorry if this is not very clear, i am rushed for time. When i get to work ill try and make a better analogy.  
07072010, 04:14 PM  #32  
 
Class 3R Laser Join Date: Aug 2007
Posts: 2,045
Rep Power: 788  Quote:
Also, your analogy shows one of the reasons fasterthanlightspeed, or even equaltolightspeed, travel beaks down in the math. Try to calculate the time dilation for your example, 198% of the speed of light, and you'll see that you can't do so with real numbers. An interesting note to add though, is that time dilation is actually a testable facet of relativity. It has been tested many times, and with the availability of consumeraffordable atomic clocks nowadays, you can even test it yourself. Because of where we are and the available velocities we have for tests, gravitational time dilation is a much bigger factor than velocity time dilation, but you can still test time dilation, in general all by yourself.  
Thread Tools  
Display Modes  
 