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Question
What is meant by (i) principal focus of a convex mirror, and (ii) focal length of a convex mirror?
Solution
Definitions-
(i) Principal focus (F) of a convex mirror - Focus is the point at which the incident rays, parallel to the principal axis, appear to have come from, after reflection.
(i)Focal length (f) - Focal length of a convex mirror may be defined as the distance between its pole and focus.
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