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LastTimelord
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Is it possible for a surface that reflects all visible light, and absorbs absolutely none to exist, Or would that violate the second law of thermodynamics?
Is it possible for a surface that reflects all visible light, and absorbs absolutely none to exist, Or would that violate the second law of thermodynamics?
Is it possible for a surface that reflects all visible light, and absorbs absolutely none to exist, Or would that violate the second law of thermodynamics?
Sure, but from an infinitely narrow crossection, so any real light beam will get at least somewhat scattered.Can a black hole send a beam of light back to its source if the beam comes in at the right angle? Without changing the light?
You specified reflectivity at visible wavelengths. However, your question about thermodynamics implies broader conditions. So I think you were asking if it was possible for a mirror that reflects all the energy from electromagnetic waves completely. I don’t think there are any theoretical limits for such reflectivity restricted to the visible wavelengths. However, I would need to examine the Kramers-Kronig relationship more closely to determine if what you say is true restricted to the visible wavelengths.Is it possible for a surface that reflects all visible light, and absorbs absolutely none to exist, Or would that violate the second law of thermodynamics?