Define the principal focus of a concave mirror.
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Explanation:
incident ray which are parallel to the principal axis of a concave mirror after reflection from the mirror meet at the particular point in front of mirror on the principal axis is the definition of principal focus .
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Answer :
Incident ray which is parallel to the principal axis of the concave mirror after reflection of the mirror meet at the particular point in the front of mirror on the principal axis is the definition of principal focus.
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