Question

define the relation R=2f in case of concave mirror​

Answer 1

Answer:

The focal point (F) of a concave mirror is the point at which a parallel beam of light is "focussed" after reflection in the mirror. ... The focal length (f) and radius of curvature (R) are defined in the diagram at the right. It can be shown that R = 2f.

Explanation:

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