Question

prove that focal length of plane mirror is infinite​

Answer 1

Explanation:

A plane mirror can be considered as a spherical mirror of infiniteradius of curvature. Focal length is half of radius of curvature and hence it is infinity. You can use the mirror formula also to get thefocal length of a plane mirror, where the image distance = − objectdistance

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Answer 2

Answer:

==>A plane mirror can be considered as a spherical mirror of infiniteradius of curvature.

==>focal length is half of curvature and Hence, it is infinity.

Explanation:

==>The mirror formula to get the focal length of a mirror where,the image distance - objectdistance.

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