How Do I See Myself in a Mirror?
A mirror shows a reflected image because it has a shiny, silver-colored coating behind the glass that reflects light. When you stand in front of a mirror, light rays move from you to the mirror. The rays bounce off the shiny mirror in exactly the same way they hit it, and you see yourself.
(When a mirror is hit by particles of light called photons, it reflects the photons back to us. When photons hit a smooth surface like a mirror, they bounce back of the mirror at roughly the same angle at which they hit the object, creating a reflection that looks the same.)
The image that you see reflected in the mirror is always backwards. In ancient times, mirrors were made of polished metal and they scratched very easily. Around the year 1300, the mirror makers of Venice discovered how to make mirrors of glass.