1.

History of plane, concave and convex mirrors in 300 words.

Answer»

Concave mirror is called  a converging mirror  because parallel rays of light fall on the mirror  they converge at a POINT called  focus. Convex mirrior is called  a diverging mirror  because parallel rays of light fall on it they diverse  after reflection.

A SMOOTH and HIGHLY polished reflecting SURFACE are is a mirror. Most commonly used are plane mirrors.




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