Question

where does lightenergy go when we off the bulb??

Answer 1

No where it was emitted earlier due to conversion of electrical energy bt now. no energy so no conversion.
hope it helps you out

Answer 2

Answers.

• Light travels at 300,000,000 meters per second. There is a very small period of time after switching it off where there still are photons from the bulb in the room. But these get absorbed/scattered by the wall and thus you don't see them.