A man holding a lighted candle in front of a thick glass mirror and viewing it obliquely sees a number of images of the candle. What is the origin of these multiple images ?

Explanation

The origin of multiple images is the multiple reflection of light between the front and back surfaces of glass. Infact, at the front surface of glass, light id partially reflected and partially refracted. The refracted ligt gets reflected at the back surface and then multiple reflections follow within the thickness of glass. They are responsible for multiple images.