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With a box that has many perfect relective mirrors, would it be possible to trap a beam of light in the box indefinetly?

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marked as duplicate by Qmechanic May 29 '13 at 0:33

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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We have a number of related questions, although I haven't seen a direct duplicate. This one overlaps in the subject material: physics.stackexchange.com/q/53225 and I think I asked the same thing in comments in the prior question about optical cavities physics.stackexchange.com/q/21301 –  AlanSE May 29 '13 at 0:08
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No, because eventually those photons will escape the box through quantum tunneling.

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