Ok, so you have two mirrors set across from eachother both at 90 degree angles from the ground so that they reflect eacother perfectly. now if you take one of the mirrors and replcae it with one way glass and then take a lazer or some other light source and shine it directly in through the one way glass, would it continue to bounce back and forth even though the light is turned off?

something like this
| |
|<-------->|<==== light shinning in
| constant |
|reflection|
| |
m1 1way glass

Lazers are very powerful beams of light, and although decieveing to the human eye, i believe them to be unrecognisably translucent. Every time the beam hit the (so called) one-way glass, i think a fraction would be absorbed thorough, and this could result in a beam. This is a good question though, and i would like to see it tried. Its one which our (mathmatically correct, yet totally inadequate) energy theories struggle with. According to our current laws "energy cannot be created or destroyed." In this case the energy is light. Another thing no-one understanads is what fills space. If we go with the "dark energy and matter theories," then if we ever find a way to detect it, i would believe it if you told me that mirrors draw on dark energy.

theoretically it should but mirrors are'nt perfectly flat and 100% reflective so if u managed these variables then yes it would aswell it needing to be in a vacumm as light travels at different speeds in different mediams

lemme try this again
...||............||
...||............||
...||<==========>||<===== light source in
...||...../\.....||
...||..constant..||
...||.Reflection.||
mirror......1way glass


if the light isn't being absorbed... shouldn't it just continue to reflect back and forth?