how focal length of plane mirror is infinity
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A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Focal length is half of radius of curvature and hence it is infinity
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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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