Question

Wt is meant by a lens and mirror ​

Answer 1

mirror lens in British. noun. photography. a lens of long focal length in which some of the lens elements are replaced by mirrors in order to shorten its overall length and reduce its weight.

Answer 2

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$\textit{LENS}$

A piece of glass or other transparent material with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses.

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$\textit{Mirror}$

A surface, typically of glass coated with a metal amalgam, which reflects a clear image.

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