Q7 What is focal length of a plane mirror?
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Answer:
The focal length of a plane mirror is infinity as the image can be formed at an infinite distance inside the mirror. A plane mirror can be recognised as a spherical mirror of infinite radius of curvature. Focal length is half of the radius of curvature and hence it is infinity.
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Answer : Infinite
Explanation:
The aw of reflection are the same for both plane mirrors and the spherical mirror. For spherical mirror we get a definite radius of curvature.
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