Originally posted by uzless
What if you took the inside of a jar and lined the inside with a seamless mirror, then angled the jar so that sunlight entered the jar and keeps reflecting back and forth in the mirror, then extremely fast put the lid on the jar that also had a seamless mirror on the bottom. Theoretically the sunlight is reflecting back and forth inside the jar so....
If ...[text shortened]... inside your house, turn the lights off, and then quickly open the jar, would sunlight shoot out?
I'd say that unless the mirror is not exactly 100% effective the incoming sunlight will quickly transform into heat and in visible light it will be completed dark inside.
I don't think it is possible to trap sunlight in a jar.
But hypothetically what would happen *if* it worked the way you described? *And*, say that the jar had a size of 300 000 km (one light second)? *And* the mirrors are not losing any ligh in the reflection process?
Then you could actually trap the light and move the jar and when you removed the lid again, it would shine out the light again during a period of 1 second.
If your jar is a billonth of the size of the jar above, it would be like 3 dm wide (a foot wide). You have to shut the lid within a nanosecond. When you open the lid again you will se a soft flash of a nanosecond. You will not be able to see that flash, anyway.
So I say no. You will not be able to do this experiment and notice the effect of letting the light off the jar. Buy a ordinary pocket flashlight instead, its more effective.