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Important terms related to a spherical mirror

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Question

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Focal length ( $f$ ) is the distance of principal focus from ______ of mirror.

A

Centre of curvature

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B

Focus principal (F)

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C

Pole (P)

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D

None

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Solution

The correct option is C Pole (P)
Focal length $f$ is the distance of principal focus from the pole of mirror.

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