Category: Optical Illusions

A property that's always been a facinating exploit of mine so when I visited the BBC Science message boards just now and found a topic surrounding the title Pepper's Ghost never heard the expression before like a source for vacuum coating glass like the surface on mirrors in 'Single Lens Reflex' cameras [or astronomical telescopes] which are surfaced on the front surface [not the back surface] this is to cancel the front surface reflections