Black Laser!!!

[toked323]

Or just do IR lasers you cant see them in day or night.

 

[nikokapo]

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."

That is indeed a fine explanation.


We've discussed this before, but it's cool to see it come back

Also, an anti-matter "beam" would just start imploding or annihilating anything right at the end of the "diode" if there was such, there wouldn't be any visible beam for us to have the time to see

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!

Yes, anything's possible. But physical theories prove things wrong sometimes. Maybe in a bunch of centuries we can actually discover that we were wrong and make a black laser so WL can copy the design and sell it as a mode hopping 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.

IDK if the world will end so soon


But 100% agreed on the fact that we should make the things we already have cheaper and better first!

 

[pseudonomen137]

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!

I like to live by Occham's razor and as much practicality as my human sentimentality can overcome. While I can't prove, 100% without a doubt, that any one thing is utterly impossible, that doesn't mean I'd be any less of an idiot to imagine it could be possible.

If people told me computers may one day be able to flawlessly imitate humans, I may not necessarily believe it, but there's enough evidence for it and uncertainty that I wouldn't completely write it off.

If I stood at the edge of a canyon with no bridge across it, and people told me I could cross it nonetheless - I just had to try walking across anyway.. Well its true I can't 100% refute the idea, but the situations obvious enough for me to call them all retards and not have to give the notion any more thought.

At least far as I understand, our current collective understanding of the universe around us sticks the notion of a 'black laser' in the same category of the bridge scenario.

 

[nikokapo]

[quote author=laserlover link=1213733576/12#13 date=1213817370]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!

I like to live by Occham's razor and as much practicality as my human sentimentality can overcome. While I can't prove, 100% without a doubt, that any one thing is utterly impossible, that doesn't mean I'd be any less of an idiot to imagine it could be possible.

If people told me computers may one day be able to flawlessly imitate humans, I may not necessarily believe it, but there's enough evidence for it and uncertainty that I wouldn't completely write it off.

If I stood at the edge of a canyon with no bridge across it, and people told me I could cross it nonetheless - I just had to try walking across anyway.. Well its true I can't 100% refute the idea, but the situations obvious enough for me to call them all retards and not have to give the notion any more thought.

At least far as I understand, our current collective understanding of the universe around us sticks the notion of a 'black laser' in the same category of the bridge scenario.[/quote]

Awesome answer. 100% Agreed.

 

[Cyparagon]

Blu-rays are black lasers, in the same sense black lights are black. But that's as close as you get.

 

[nikokapo]

Blu-rays are black lasers, in the same sense black lights are black. But that's as close as you get.

No :S

they're near UV lasers / near blue (473nm) lasers..

the black part doesnt mean you cant see it. if not, IR lasers would be black lasers too.

 

[Switch]

Meh , all the technology in the world won't ever never be able to create a black laser.It just can't exist.I mean, black is the absence of light, then you put it near the term "laser", you know, light amplification etc, etc. How can light emission suck light in? The whole concept of a black laser is as absurd as a square circle. :

 

[iewed]

The first black laser WL creates would probably be their first functioning "normal spectrum" laser. I really think the only way that they could be any further away from their stated product would be to sell "Super Lasers", which in essence would be a magnifying glass that cost you $3000. Once you receive your "Super Laser", it (the magnifying glass) comes in a cardbox box with a set of instructions, those instructions would read "On sunny day, go outside and hold up super laser in air. Now you have all color lasers in 1!".
/off topic.

 

[Midknight]

The first black laser WL creates would probably be their first functioning "normal spectrum" laser. I really think the only way that they could be any further away from their stated product would be to sell "Super Lasers", which in essence would be a magnifying glass that cost you $3000. Once you receive your "Super Laser", it (the magnifying glass) comes in a cardbox box with a set of instructions, those instructions would read "On sunny day, go outside and hold up super laser in air. Now you have all color lasers in 1!".
/off topic.

LoL, It would never sell. Because wickedlasers would charge about a fuctillion dollars. And it would probably be under powered.

 

[motorider826]

what if the laser outputs a specific wavelength that causes destructive interference with the light in the room. So by canceling out the light in that 'ray' then the light wouldn't reflect back at you thus creating an absence of light 'laser'. Think noise canceling headphones on steroids and crack.

 

[Switch]

I really think the only way that they could be any further away from their stated product would be...

Hey come on, that's based on absolutely nothing except the reputation WL has around here.You don't own any of them yourself so you have any reason to hate them that much.I mean I seriously don't think they're THAT bad.

Btw, you think a magnifying glass could mode hop?

 

[iewed]

I really think the only way that they could be any further away from their stated product would be...

Hey come on, that's based on absolutely nothing except the reputation WL has around here.You don't own any of them yourself so you have any reason to hate them that much.I mean I seriously don't think they're THAT bad.

Btw, you think a magnifying glass could mode hop?

I know, I wasn't being serious. I don't hate the company, I actually find their chat function and reading the reviews amusing.

And from what I've I heard of WL, they can make anything mode hop.

 

[Schrecken_Licht]

I've seen this type of post so many times and darn it if I didn't have a dream last night that I had a black laser (not a blu-ray).....when I first saw this thread I thought "Oh no, not another "black laser" discussion!" When I was on LC such a thread seemed to come up (or be bumped) every few months.

But in my dream the laser (it was a pointer, BTW) worked this way: whatever I would shine it at would simply become pitch black; as if it wasn't there. I shined it at my hand and what was "illuminated" by the beam simply appeared to be black and featureless, an absence of everything. I would shine it at a white wall, and there was a black dot. But it wasn't like the wall was painted black - it was like the vacuum of space - appearing if there was nothing, no matter or energy, there at all - just a void.

 

[Abray]

interesting! the only way I can think of that would make this work is that all light that hit that surface would have to be either completely absorbed (although this still doesn't create the "void" you were talking about). or the light projected from the laser would have to make the surface not be able to rebound light nvm I'm confusing myself now!

 

[pseudolobster]

what if the laser outputs a specific wavelength that causes destructive interference with the light in the room. So by canceling out the light in that 'ray' then the light wouldn't reflect back at you thus creating an absence of light 'laser'. Think noise canceling headphones on steroids and crack.

yeah, maybe that could work...
but think about it... to simplify let's say the room is only being lit with one wavelength of light, since real world conditions would mean you'd need to do this for every wavelength... but at any rate, the amount of light being cast on each area of the beam would be different.. so your anti-beam would need to dynamically modulate its amplitude to match the light in the area it's passing through... of course you could have some hypothetical super-accurate super-fast sensor that detects the position and vector of every photon in the room, but in order for it to modulate the beam to match in real time it would have to calculate at faster than the speed of light, which simply isn't possible.

 

[Abray]

wow that little necessity of having to calculate faster than the speed of light makes it impossible.

The closest thing you could get, assuming you could create that destructive interference, was a dark beam/spot. Everything in it would be darker and maybe just less bright, but it would be near impossible to find the exact setting of light in which it created the perfect interference needed. Unless you simulated it, of course.