Does light still exist in this situation?

I’m going to have to consult Newton, Einstein, Tesla, Edison and a few others on this one. I’ll get back to you.

Scientists are very punctual, apparently. They all said, “See Jayne’s answer below.”

It depends on the construction of the box; if the surface is perfectly reflective, then the light will continue to bounce around, yes (but if you opened the box, it would only “glow” for approximately the amount of time it takes for light to cover the distance from wall-to-wall, a minuscule interval). However, no material is perfectly reflective, and over time photons will be absorbed into the atoms of the box as heat, and the box would go dark.

I wonder if Schrödinger’s cat knows…?

GOK, that means god only knows, i think box’ll go dark