Here's the scenerio: you have box (shape is not necessarily important, but for simplicity we'll say its a cube), within the cube is a vacuum and the inside of the box consists of "perfect" mirrors, meaning that no light is absorbed (obviously this is not possible in the real world), however light can enter the box through the outside of the walls. If you place the box out in the light what would happen? I have only studied up to Introduction Physics in university as I am a Bio major, so I am unsure of the affect that one photon can have on another. So would the box infinitely "absorb" the light into itself and nothing would ever "happen" or would there be a threshold point that could be reached at which point "something" would happen, or lastly is there always a small affect occurring that would simply be magnified the more light enters the box? Also the light could be "natural" as in a mix of different types of light (visible and nonvisible). Or it could be specifically gamma rays or UV etc... If the difference in energy levels will affect the end result of the hypothetical experiment.