Old 06-17-2008, 09:12 PM #1
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Default Black Laser!!!

how cool would a laser that emits a pure black beam be? it would be easy to see during the day but near impossible to see during night!


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Old 06-17-2008, 09:17 PM #2
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Default Re: Black Laser!!!

How impossible though,, since black means NO light
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Old 06-17-2008, 09:29 PM #3
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Default Re: Black Laser!!!

It would be dumb...
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Old 06-17-2008, 09:30 PM #4
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Default Re: Black Laser!!!

my finger is a see through laser! ;D
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Old 06-17-2008, 09:33 PM #5
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Default Re: Black Laser!!!

An antimatter beam!
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Old 06-17-2008, 09:40 PM #6
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Default Re: Black Laser!!!

Quote:
Originally Posted by Glaserfan
How impossible though,, since black means NO light
So very possible. Anything not emitting light would classify. ;D
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Old 06-17-2008, 10:12 PM #7
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Default Re: Black Laser!!!

;D at [smiley=smiley_up.gif]

I don't think an "anti-laser" would be possible to make. But imagine how cool it would have been, though! Just shine a powerful one around in a lit room, and it would have drowned ont the light in the area where the dot hits. At night, it would have been invisible, but in sunshine, you could see it as a black spot! It would have looked a bit weird, but really cool. 8-)
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Old 06-17-2008, 11:15 PM #8
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Default Re: Black Laser!!!

I have a blacklight laser.... ;D
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Old 06-17-2008, 11:23 PM #9
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Default Re: Black Laser!!!

I have a lot of black (0nm) lasers. Also classified as a dead laser. ;D

However, I believe the emission of Black (nothingness) = Wormhole.

Technology we may be to far from.
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Old 06-17-2008, 11:45 PM #10
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Default Re: Black Laser!!!

Lets start off slow. Lets master the UV, then other wavelengths first. Then once we breach the scientific knowledge of creating black holes, then we can try to "suck" the light out of the world in a straight beam. Wonder how the divergence would be. This topic should be in the Science of lasers forum, or "Off topic". Black lasers do not exist, either do grey or other shades (not colors). The world I think will end before we see this kind of technology. Laserlover, you're stupid. ;D Just kidding! This topic has actually been brought up several times, I even thought of it when I was 10 and first started loving lasers myself. ;D
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Old 06-18-2008, 12:21 AM #11
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Default Re: Black Laser!!!

Where does white fit in that? Its not a colour, LOL but its not unlight :-?
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Old 06-18-2008, 02:01 AM #12
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Default Re: Black Laser!!!

You get white 'lasers' when you stick multiple wavelengths together, white isn't actually a wavelength.
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Old 06-18-2008, 04:03 AM #13
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Default Re: Black Laser!!!

Here comes the physics:

The physical concepts behind a black "laser" limit any such development. There is no such thing as an anti-photon because a photon is not actually a particle. It's a cluster of waves that are treated as particles for simplicity. In theory, you could produce photons that exactly cancel out other photons by means of destructive interference, but each anti-photon would need to be exactly the same as the photons it encounters, and since there are a limitless number of types of photons, no such anti-photon beam could practically exist without faster-than-light detection and driver electroncs. If it did exist, you wouldn't know it was working because it would only cancel out the photons directly in front of it, and aiming it at a wall would have an effect so miniscule that it would be undetectable by all but the most sensitive photomultipliers. Furthermore, in order for such a device to have a visible beam, the photons emitted would have to also intercept photons traveling in other directions, which in itself would be impossible. The entire concept of a black laser isn't just a question of engineering. It is physically impossible for such a device to exist.

An antimatter beam, on the other hand, is possible. But it sure wouldn't act like a black laser! A beam of antimatter would collide with the matter that make up the air and annihilate itself in a burst of energy in the form of heat. This would have no effect on photons in the area and also would have the side effect of killing everyone nearby by means of massive explosion. And if you pointed it at a person, well, Spengler from the movie "Ghostbusters" describes it quite nicely:

"Try to imagine all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light."
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Old 06-18-2008, 08:29 PM #14
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Default Re: Black Laser!!!

i think it is funny how people get so wrapped up in our (us humans) theories that we forget that ANYTHING IS POSSIBLE! for example if you were to go back in time and tell a cave man that in the future there will be lasers that can shoot down rockets and that man would one day put a man on the moon he would say "thats impossible" but hey take a look around, its been done.

my point is that even if something seems totally impossible doesnt mean it is, after all technology doubles every 18 months! :P
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Old 06-18-2008, 08:54 PM #15
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Default Re: Black Laser!!!

Pfft, "Black", is there an orange-green coloured laser? : ;D

I think not, but maybe in 18 months...
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Old 06-18-2008, 08:55 PM #16
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Default Re: Black Laser!!!

Would that be anything like a tangerine-lime laser? :
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