As mentioned, there was a post about this some time ago.
The "theoretical box" would have to reflect 100% of the EM energy that is light. The photons will expecience a "lamda shift" and eventually lose all energy to adsorption. Blue light would eventually fade to red, and down to radio, and subsequently further down the spectrum ...
Energy always flows down hill - this is an important concept to remember in these conceptual situations.
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rm -f /bin/laden
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