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Image formed by Concave Mirror

What is the f...

Question

What is the focal length of a plane mirror?

A

0

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B

${\infty}$

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C

25 m

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D

25 cm

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Solution

The correct option is B
${\infty}$

Focal length is defined as the distance between the centre of a lens or curved mirror and its focus. Focal length of plane mirror is infinite.

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