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CBSE Class 10 Answered

define the principal focus of a concave mirror  
Asked by kapugantiprabhutej | 27 Apr, 2018, 07:52: PM
answered-by-expert Expert Answer
Principal focus of a concave mirror is a point where light rays parallel to principle axis converge.
 
The distance between pole of mirror to point of principle focus is focal length of mirror.
Focal length of spherical mirror is half of its radius of curvature.
Answered by Thiyagarajan K | 29 Apr, 2018, 07:11: AM
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