If I were to trap a beam of light inside a perfectly mirrored cube or sphere, what would happen to it?

Question

If I were to trap a beam of light inside a perfectly mirrored cube or sphere, what would happen to it?

Answer 1

if the reflection need energy it will ware off

what is mean by perfect is that that reflect does not require energy then the light beam will keep reflecting for ever in side the sphere.but this is not practically possible

Answer 2

it would continue bouncing off the walls until all the energy from the beam has fed into the glass

thats what i believe

Answer 3

Light travels in waves, once you cut the wave you cut the light. A shadow is formed in that way. So when you seal the sphere the wave will be cut and darkness will follow inside.

Answer 4

If the mirrors were lensed, it would amplify continuously untill the cube explodes, at which point the extremely intense and searing light ray would shoot off in an unpredictable direction, leaving behind 2.4 children and another on the way.

Answer 5

Nothing - unless you were to trap the source of the light inside the sphere or cube. In that case it would reflect continously for as long as the source was on. Note some energy is lost in reflection and travelling through air (but if we are talking vacuum and perfect mirror - theoretically the reflections are infinite). Due to law of conservation of energy it will keep on going as long as no energy is lost along the way.

Answer 6

Trap it and see. It's called experimentation and is the basis of science.

Answer 7

it would disappear between the time it takes you to trap it and to seal the cube/sphere.

so it'll be pitch black inside