Hard Light Productions Forums
Off-Topic Discussion => General Discussion => Topic started by: Kosh on October 17, 2009, 07:01:18 am
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Electromagnetic blackholes anyway (http://www.physorg.com/news174893601.html). They seem to be the perfect microwave absorbers, made from meta materials.
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Already been done
http://www.youtube.com/watch?v=fUjfaPwZYr8
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Actually no. There is very little blackhole-esque in this research, though I'm a little bit curious about why PhysOrg calls it such. By glancing through the Arxiv paper, it is like reading two entirely different takes of the subject.
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Yeah, this is kind of a misnomer...
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Absorbs micro, emits infra-red? I'd expect more from a black hole :doubt:
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Question to the physics guys: What are some possible applications for something like this?
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We can finally act out my favorite weapon from Armed and Dangerous.
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Karajorma will appreciate that reference :D
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Never actually played it, but the videos on the official website are cherished childhood memories :D
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Yeah, that headline is pretty fail. Cool concept, though.
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We can finally act out my favorite weapon from Armed and Dangerous.
No love for the Land Shark Gun?
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I guess kosh decided to stay as a regular poster after all.
Also, I have heard about the possibility of sub-atomic black holes existing and that the large hydron collider will try to see if they can create them, or at least that it is possible that they may be created as a result of smashing sub-atomic particles together, but will dissipate in a mere fraction of a second making it so it won't hurt anything, though this is probably not related to this discussion 100%.
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pics or it didnt happen
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I guess kosh decided to stay as a regular poster after all.
Also, I have heard about the possibility of sub-atomic black holes existing and that the large hydron collider will try to see if they can create them, or at least that it is possible that they may be created as a result of smashing sub-atomic particles together, but will dissipate in a mere fraction of a second making it so it won't hurt anything, though this is probably not related to this discussion 100%.
It's actually far more related to black holes than the original article is. :D
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I didn't read the article but I will browse it now. :)
Edit: I read it. Sounds more like a substance that absorbs a frequency of light, microwaves in this case. Are they going to call anything black that is a circle or sphere a black hole too, which absorbs visible light but visible light can't escape? Sounds like they may have slightly changed the definition of black hole.
I think the real definition of a black hole, at least my definition, is an extremely massive, but not necessarily a large object, that has such strong gravity that light can't escape, and the light can't escape because the gravitational power exceeds the power of the light. If light doesn't escape because of something other than gravity, then it can't be called a black hole. It must be because of strong gravity.
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pics or it didnt happen
Taking a picture of a black hole?
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"Can I buy some pot from you?" -- Brian Griffin
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Taking a picture of a black hole?
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"Can I buy some pot from you?" -- Brian Griffin
You could do it. You can take a picture of the wind, too; by what it does.
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funneh or epic fail, you decide
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I think they have mixed the definitions of black hole and black body.
It would be close to ideal black body (on microwave frequencies at any rate). Not a black hole as has been mentioned.
Or, it could just be (as is mentioned in the article) a construct where microwaves' behaviour closely resembles their behaviour close to an actual event horizon. It's a really bad headline though, and much like a black body, the fact that nothing is reflected doesn't mean nothing is not emitted. The microwaves don't just disappear into the object.
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doesn't mean nothing is not emitted.
:wtf:
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lol, triple negative
:nervous:
Nobody has blinded me, said Polyphemus the Cyclops...
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if they could make the substance absorb infrared and radar, they could make some really cool stealth tech.
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if they could make the substance absorb infrared and radar, they could make some really cool stealth tech.
RADAR works using microwaves. Although I don't know how wide band of frequencies is affected by this metamaterial, and also I don't know if there would be problems similar to submarines being detected because they're more silent than the water around them...
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I thought microwaves are shorter than radar waves?
as for the submarine problem, I dont think it would apply to aircraft.
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Well, there are radars using both radio and microwaves. The line between the two is arbitrary anyway.