1.
Define the principal focus of a
al focus of a concave mirror.
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Q. Define the principal focus of a concave mirror.
Answer:-
The principal focus of the concave mirror is an point on the principal axis of the mirror, where incident rays of light, parallel to the principal axis, after reflection from mirror surface, intersect each other
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point on principal axis where the Ray's of light incide ce on the mirror parallel to principal axis converge or appears to be converge
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