Physics Question #307

Courtney, a 12 year old female from the Internet asks on December 17, 1997,

How do mirrors work? What makes them reflect?

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The answer

Barry Shell answered on December 17, 1997

Glass mirrors are made by evaporating a thin layer of silver onto the back of the glass. The surface of the mirror is very smooth and reflective, so light reflects off it very well. Almost all the photons in the incident light beam are neither absorbed or scattered, but are perfectly reflected at an equal and opposite angle from the angle of incidence.

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