Shields

jezrianna · Post by **jezrianna** » 2002-12-07 10:21pm

I have a question. I have heard that holograms have all the optical properites of the objects they duplicate...so, if a hologram of a mirror is projected in front of a laser, that holographic mirror will deflect that laser, without any threat of overheating? Since a hologram can't expericence thermal cracking? Am I right? Would such a device make an effective energy shield?

Exonerate · Post by **Exonerate** » 2002-12-07 10:47pm

o_O Where did you get this idea? AFAIK, this is total bull... Oh, btw, POKE!

The Dark · Post by **The Dark** » 2002-12-07 10:51pm

Gah! I've been beaten to the poke yet again!

I don't believe it would have the exact same qualities. Since it is an image of light, it would not have reflectivity or wavelength absorption properties of matter.

Welcome, stoat! Poke!

Raxmei · Post by **Raxmei** » 2002-12-08 12:20am

This would be more thoroughly answered if you posted it in Other Sci-fi or SLAM.

Howedar · Post by **Howedar** » 2002-12-08 12:27am

jezrianna wrote:I have a question. I have heard that holograms have all the optical properites of the objects they duplicate...so, if a hologram of a mirror is projected in front of a laser, that holographic mirror will deflect that laser, without any threat of overheating? Since a hologram can't expericence thermal cracking? Am I right? Would such a device make an effective energy shield?

You've heard bullshit.

Post by **Sea Skimmer** » 2002-12-08 12:31am

Utter crap detected, ignore all future "information" from whatever your source is.

*POKE*

Post by **weemadando** » 2002-12-08 01:01am

Bollocks.

Don't make the Jihad beat you just for sheer stupidity.

1) Stupid fucking concept.
1a) Stupid fucking concept posted to the wrong fucking forum.
2) You actually believed this shit?
3) You really believed this?
4) Is this from RSA's site as his new way to beat SW?
5) Stupid fucking concept.
6) Where the fuck is this from?
7) You posted it to the wrong forum.
8) STUPID FUCKING CONCEPT.
9) You convienently ignored all logical and physical laws.
10) Where the fuck did YOU come from?

Thats about it for now from me.

Darth Yoshi · Post by **Darth Yoshi** » 2002-12-08 01:39am

The holographic mirror won't work. I suggest you take a frying pan and whack whoever told you this on the head. And welcome to SD.net. *chucks egg*

jezrianna · Post by **jezrianna** » 2002-12-08 08:45am

I happily admit I'm not an engineer, scientist, etc, so pardon my ignorance, but [i]why[/i] won't it work? 'Because I said so' isn't a very good, or illuminating, answer.

Post by **Vympel** » 2002-12-08 08:50am

jezrianna wrote:I happily admit I'm not an engineer, scientist, etc, so pardon my ignorance, but why won't it work? 'Because I said so' isn't a very good, or illuminating, answer.

Be nice to the newbies guys. Weemadando, that was uncalled for mate.

And I have no idea whether that would work.

Evil Sadistic Bastard · Post by **Evil Sadistic Bastard** » 2002-12-08 08:53am

Have you seen a beam of light shine through another beam?
Same principle.

jezrianna · Post by **jezrianna** » 2002-12-08 11:39am

Yes I have. But I have also seen a holograph of a lens act like a lens (i.e. magnify stuff). I just thought that if a holograph of a lens could bend light, why couldn't a holograph of a mirror reflect light? And if so, wouldn't that make an effective energy shield?

RedImperator · Post by **RedImperator** » 2002-12-08 11:40am

I'm not a scientist or engineer either, but my guess is that it wouldn't work because a mirror is made of physical matter that can bounce a laser's photons away. A holographic mirror wouldn't work because it would only be a collection of photons itself, and photons don't bounce off each other when they interact--that's where the wave properties of light come in. There would be some constructive or destructive interference between the laser beam and the hologram as the beam passed through, but both would immediately return to their previous state as soon as the beam was through.

RedImperator · Post by **RedImperator** » 2002-12-08 11:51am

I should probably mention that a Star Trek hologram isn't like a real hologram. In Trek, the holograms have some material (or pseudo-material) qualities because they're constructed of forcefields as well as light, and since we have no idea what qualities a "forcefield" might have, it's concievable that a forcefield could reflect, bend, or otherwise fiddle with light in a way that a hologram can't. Of course, conservation of energy comes into play with forcefields, because it's impossible to have a 100% efficient reflector no matter what technology you use, and so some of the laser beam's energy is going to end up getting transmitted back to the forcefield generator. A sufficiently powerful laser would melt the forcefield generator, even if the forcefield "mirror" was 99.999999% reflective. Also, photons have kinetic energy, all of which would end up having to be absorbed by the field generator, so even if you COULD have a 100% refelctive mirror, a sufficiently powerful laser beam would have enough KE to destroy the forcefield generator.

I don't know if you were thinking about Star Trek or not, but since Trek is the franchise that's made the most use of holograms, I thought I'd mention it. At any rate, I'm pretty sure that this information would apply to regular holograms if they COULD be used as mirrors (heat and kinetic energy would have to be absorbed by whatever physical device is projecting the hologram, no matter how efficient the mirror was).

Post by **Alyrium Denryle** » 2002-12-08 12:07pm

"Teshook electrum niraldor"

*POKE* (Stabbing pain racks through your body, as electricity arcs bewteen my hand, and your body. Your hair stands on end as the pain becomes so unbearable you pass out) So I cast shocking grasp beofre poking him, is there something WRONG with that?

Post by **weemadando** » 2002-12-09 07:53am

Vympel wrote:
jezrianna wrote:I happily admit I'm not an engineer, scientist, etc, so pardon my ignorance, but why won't it work? 'Because I said so' isn't a very good, or illuminating, answer.
Be nice to the newbies guys. Weemadando, that was uncalled for mate.

[Danny Bateman]Sorry, I just see that stupidity and I have to go after it like a bull. *paws at screen*[/Danny Bateman]

Post by **Darth Wong** » 2002-12-09 09:45am

All right, this is why it's stupid:

Holograms do not reflect light.
Trek "holograms" appear to reflect light because they are actually forcefields. They are not actually holograms.
If you want to use a Trek "hologram" to deflect an energy beam, it would be much more efficient to use a forcefield designed for that purpose, rather than one which incorporates various useless extra features necessary for making itself look like something.

OK?

jegs2 · Post by **jegs2** » 2002-12-09 10:43am

jezrianna wrote:I have a question. I have heard that holograms have all the optical properites of the objects they duplicate...so, if a hologram of a mirror is projected in front of a laser, that holographic mirror will deflect that laser, without any threat of overheating? Since a hologram can't expericence thermal cracking? Am I right? Would such a device make an effective energy shield?

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RedImperator · Post by **RedImperator** » 2002-12-09 12:21pm

Darth Wong wrote:All right, this is why it's stupid:
Holograms do not reflect light.

Trek "holograms" appear to reflect light because they are actually forcefields. They are not actually holograms.

If you want to use a Trek "hologram" to deflect an energy beam, it would be much more efficient to use a forcefield designed for that purpose, rather than one which incorporates various useless extra features necessary for making itself look like something.
OK?

W00t! I was right.

jezrianna · Post by **jezrianna** » 2003-05-27 12:01am

Perhaps I failed to make myself clear before. I'm not talking about Star Trek holograms, I'm talking about REAL holograms. I have seen a holo of a lens act like a lens, and a holo of a mirror act like a mirror ( at least I think so ) Of course, these holos were suspended in glass plates, which would be subject to heat from energy attacks. Is it possible to project a hologram outside of its recording media? i.e. into open air?

Post by **Sea Skimmer** » 2003-05-27 12:07am

Why the fuck did you wait nearly six fucking months to bump up a short dead thread to add this information?

Keevan_Colton · Post by **Keevan_Colton** » 2003-05-27 12:09am

jezrianna wrote:<snip>

What properties did these holograms exhibat that led you to conclude these things?

DPDarkPrimus · Post by **DPDarkPrimus** » 2003-05-27 12:38am

Beams of light = able to be any sort of matter? WTF was the person who told you that smoking?

Korvan · Post by **Korvan** » 2003-05-27 04:13pm

jezrianna wrote:Perhaps I failed to make myself clear before. I'm not talking about Star Trek holograms, I'm talking about REAL holograms. I have seen a holo of a lens act like a lens, and a holo of a mirror act like a mirror ( at least I think so ) Of course, these holos were suspended in glass plates, which would be subject to heat from energy attacks. Is it possible to project a hologram outside of its recording media? i.e. into open air?

Those optical properties of holograms only apply to objects that were captured when the hologram was taken. So a holographic mirror can show a relection of a rose if that rose was in the initial holo, but if you looked into the holo-mirror, you would not see your own reflection.

GrandMasterTerwynn · Post by **GrandMasterTerwynn** » 2003-05-27 10:53pm

jezrianna wrote:Perhaps I failed to make myself clear before. I'm not talking about Star Trek holograms, I'm talking about REAL holograms. I have seen a holo of a lens act like a lens, and a holo of a mirror act like a mirror ( at least I think so ) Of course, these holos were suspended in glass plates, which would be subject to heat from energy attacks. Is it possible to project a hologram outside of its recording media? i.e. into open air?

Jesus imaginary Christ it takes you a long time to reply to posts.

A hologram is something that can't exist outside of it's recording media. Therefore, it would have the same physical properties as the media it's recorded on. All a hologram is is just a photograph taken of the interference patterns made by illuminating something with a laser. Thus, you're asking the same thing as "If you could project a photograph into the air, could it stop energy attacks." And the answer is the same, namely hell no.

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