Question

Write relation between focal length and radius of curvature​

Answer 1

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The radius of curvature (r) is the radius of the lens that forms a complete sphere. Therefore, the radius of curvature is twice the focal length.

Answer 2

Answer:

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.