I'll assume for the moment it's a serious question.
There's only one souce of light in the room. All the mirror does is reflect
back that portion of the light that would otherwise have been absorbed by a
wall or some such thing.
"yogesh" <[Only registered users see links. ]> wrote in ...
Yes. That's why torches have reflectors. Expect about 30% brighter room
with a nearby mirror (any better approximations?).
1 Less than half the light from the candle reaches the mirror (from 1 side).
2 The mirror is only about 90% efficient.
3 A white wall is nearly as effective, so the mirror will give a lot more light
than a black wall.
There is a fixed amount of light output from the candle though, be an intereresting
geometry problem to see if many mirrors approaches this value, the
location for the measurement of brightness has to be considered.