Why are we not able to capture and store light between two mirrors? I'm going to take a guess at the answer but I'd like to hear from someone who knows for sure... I'm wondering if you actually can for a small amount of time, but the inefficiencies of an imperfect mirror cause some light to be absorbed and converted to heat. Since the speed of light is so fast, a tiny inefficiency will be multiplied millions of times in a short fraction of a second and whittle away at the light until it's gone, giving the appearance that it goes away instantly when the source is removed. Is this anywhere close to correct?