Black lasers!

it IS possible - and not just in fairy land!

it's possible in 3d renderers such as 3DsMaX

all you need to do is create a light (spot) with a narrow beam and a NEGATIVE light multiplier - it then sucks light out of the scene...

it could also be done in computer game engines too - i'm sure with interesting effects...

thats my 2 cents.

fairyland = Virtual Reality & PC-games???

Still, would be a cool concept, to try it and toy around with it (while fragging others?!?)

I have thought about this before.... It would freeze things most likely instead of burn.

HeHehe.. this thread still going? Ok well maybe in like 2200 we might have something like this but lets get real.. we have a hard enough time making other lasers so... you be the judge.

It "would" be the only laser visible in daylight. ;D

Well, I think there is a difference between "get an existing colour" and "get a theoretical object"

"Might be easier to get an octarine laser

How to make a black laser:

Objective:
To convert a normal DPSS, Diode, or any other type of laser into a 'theoretical object' that emits 'negative' photons.

Materials:
Any laser (green, red, blue; preferably the most expensive one you own)
Batteries
Microwave oven

Procedure:
Insert batteries into laser correctly.
Place laser inside microwave oven in the 'on' position.
Set the microwave oven to 30 seconds on high.
Press start.
Wait for countdown to stop.
Remove laser from Microwave oven.

Data/Observations:
When the 'start' button was pressed the microwave oven activated.
The laser (100mW CNI) flickered and after 5 seconds became black.
The microwave oven sustained irreparable damage and caught fire and the laser itself produced sparks.
When looking inside the aperture of the laser (while turned on) it appeared black.

Conclusion/Disclaimer:
This experiment is not likely to convert ANY laser into a black laser. It will most likely destroy your laser and the microwave, however, it has not been tested and this experiment is based solely on common sense. If you would like to test it, go for it. I accept no liability for damage to any persons (including yourself) or property (if you live in the early 1800's in the southern states of the U.S., property may include persons).

There are 2 devices on the market that can do this...
A DED.. (Dark Emitting Diode) and a Fridge..

A fridge ??? sure.. here is how.. turn off the light in your room.. now where do you think the light went ??
-> open the fridge and TADAA... there you have your light again

The way I see it, It's impossible.

black is the absense of light, correct?

For example, when you see a black object, it is because it absorbs all the visible light, meaning no visible light reflects off to enter your eye.

so for a black laser, you would have to emit no light? and if you aren't emitting any light, that wouldn't even be a laser...

Hi!

Well, here's an interesting thought for ya... relates to the current fun that some folks aren't really having in creating "camo" suits for tanks and things - that makes them seem transparent.

Have you ever seen those headphones that create a mirror image of incoming sound waves, inverted, so the waves cancel each other out?

Imagine a source that could do something like that, and actually project all the wavelengths needed to make a point "disappear" into blackness as it would no longer be reflecting any light - because it was all being cancelled out ...

What a cool concept - but alas, it'll probably be a LONG time before we see anything like that!

But who knows?

D

Lol i looked at this thread and now i cant even feel my brain antimatter pocked fusion accelerators...my brain hurts..

Xantos that is a good idea just like they are making this flying car and to make it quiet they are putting a speaker in it that emits the exact same sound the motors do so the cancel each other out...



....lazer.... ;D ;D ;D

Thats a good idea haha.

if you applied that to lasers to try and make a black beam, how would that work?

I heard that mass is actually lost during nuclear reactions, and converted into energy. hence E=MC[sup]2[/sup]. So, maybe that has something to do with antimatter and 'antiphotons'.... just a thought.

That would be fun. A nuclear reactor in your pocket! It will probably be found to cause cancer though...

XAN,
That's called "cloaking"

I saw a USA patent titled "cloaking device". A big screen video it depicted as one claim.

Then last week I saw a physics article posted about a material that you can hind behind because it memics the image of oposit surface.

the_stark said:

I heard that mass is actually lost during nuclear reactions, and converted into energy. hence E=MC[sup]2[/sup]. So, maybe that has something to do with antimatter and 'antiphotons'.... just a thought.

That would be fun. A nuclear reactor in your pocket! It will probably be found to cause cancer though...

Click to expand...

nicely said.

Reality check: mass[sub]antimatter[/sub] + mass[sub]matter[/sub] in kilograms * roughly 10[sup]17[/sup] will give you energy in joules. Now go figure the kiloton equivalent of your left leg and hide from the police for "posession of a weapon of mass destruction".

Nuclear reactor in your pocket? Fun stuff there. They once produced a battery (in the 50s) that consisted of a radioactive substance decaying, phosphor around it that was lowing due to radiation (like me). Then a primitive silicon "solar cell" was placed around it and created power for the next years.

Even more fun: use a big lump of decaying stuff, hook it up to a peltier element, let the other side be cooled by the surrounding environment and you got yourself a 10-yr-battery! Useful for satellites (but risky, imagine the rocket explodes few miles above, like, Cape Canaveral, and have several hundred kgs of highly radioactive dust raining over the US) or , as used in the Soviet Union, for remote light houses, so that you don't have to ship a refueling troop there every few months, it would just fire its light powered by the radioactive TEC battery. "Funny" part: SU fell apart, and so did these towers. Nobody to maintain them, the radioactive was dumped in some forests for the local residents to stumble upon and "radiate in joy"...
Man there are quite some fun stories with non-conventional power generation from nuclear material.

So a reactor in your pocket, properly shielded, would be feasible but sure not cheap (and not powerful, for sure!).

very interesting