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Cosmic Queries – The Science of Invisibility with Greg Gbur
StarTalk Radio
The Problem With Invisibility Cloaks
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If you were to make the entire electromagnetic spectrum invisible through an object, then you'd have to have materials serving every band of light in that electromagnetic spectrum. So that would be a problem. You usually don't see people looking at sort of super broadband invisibility cloaks. They're really happy right now if they can study a cloak that'll block or make invisible some parts of the spectrum and try to learn from that.
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