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antwan89
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I have a question that has been puzzling me. If a beam of light was released within a sphere or cube with a completely opaque inner surface would the inner area remain bright for a prolonged period of time or perhaps indefinitely assuming a vacuum exists within the sphere?
Perhaps a perfectly opaque surface does not exist? Perhaps a mirror made from a superconductor would be a more effective inner surface assuming the mirror isn't already the most opaque surface available, although I understand there heat losses occur when light is reflected off a mirrored surface.
Perhaps a perfectly opaque surface does not exist? Perhaps a mirror made from a superconductor would be a more effective inner surface assuming the mirror isn't already the most opaque surface available, although I understand there heat losses occur when light is reflected off a mirrored surface.