define the principal focus of concave mirror
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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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AnsweTHE FOCUS OF A CONCAVE MIRROR IS A POINT IN THE ORINCIPAL AXIS THROUGH WHICH THE LIGHT RAYS INCIDENT TO PARALLEL TO THE PRINCIPAL AXIS PASS AFTER REFLECTION FROM THE MIRROR
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