Question

If ‘R’ is radius of curvature of mirror and ‘f’ is focal length, which of the following relation is correct?

Answer 1

Explanation:

The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature. It is important to note up front that this is an approximately true relationship.

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Answer 2

Answer:

Radius of curvature = R and Focal length = f

then , R = 2f