Question

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What is Principal focus of mirror ?????????????

Answer 1

Explanation:

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⏭️the principal focus of a mirror is a point on the principal axis of the mirror at which , the light rays which are parallel to the principal axis actually converge for appeared to diverge after reflection.

Answer 2

Principal Focus :

Focus is a point on principal axis on which the ray of light coming parallel to principal axis intersect After refection.

It is denoted by F

Distance between pole to principal focus is known as Focal length (f).

Focal length is half of Radius of curvature.

Focal length = Radius /2

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