text: can an infinity power source be created by the following method? if a stainless steel glass is taken and a spherical internally reflecting mirror is created with a hole at one spot which is closed by a one side reflecting mirror.then if a light is sent in through the spot where one side mirror is there which can only send light in not out then due to elastic collision tendency of light will it prevail inside the sphere without losing energy . i got this idea from opticalfibre lesson in my engineering physics book no.  even if you cold create a perfect reflector (which you can't - its why a hole into a box is described as the perfect black body) all you would achieve is to store the photons. you would derive no more energy than you put in.