What If you enclosed an astronaut in a mirrored sphere?

Question

The space person is floating dead center in a closed sphere with totally seamless, mirror polished surfaces and no light. He/she/it turns on a flashlight. What would happen?

Answer 1

Depends on the curvature of the mirror.  If the sphere were small, the beam from the flashlight would diverge, hit the mirror, and converge back to the astronaut.  He would see the beam as a bright spot either on the mirror (if it happened to hit his eye) or somewhere on his suit (if it hit his suit and was then scattered into his eye).  If the sphere were larger, its sides would curve slowly enough to be roughly equivalent to flat mirrors.  In this case, the flashlight beam would bounce back and forth past the astronaut many times, creating a "hall of mirrors" effect.