The thing that an n dimensional medium can represent n+1 dimensional object can be debated true in case of drawings on paper etc... But see the real image formation on a mirror.We see the things around us(in 3 dimension) due to the reflection of light from those objects which is being processed by our eyes.Now see a mirror image.Here the reflection takes place two times , one is:reflection to the mirror and the second: from mirror to our eyes.What is the change that this series of reflection can make to the dimensional appearance of the object from a single reflection that we originally see???