What is focal length of mirror?
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it is the the distance between pole and principal focus of the mirror
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The focal length of mirror is the distance between its pole and principal focus.
If P is the pole of mirror and F is the principal focus, so the distance PF is the focal length of mirror denoted by f.
f= R/ 2 where is radius of curvature of mirror.
If P is the pole of mirror and F is the principal focus, so the distance PF is the focal length of mirror denoted by f.
f= R/ 2 where is radius of curvature of mirror.
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