Question

write realtions between focal length and radius of curvature​

Answer 1

Answer:

The relationship between the focal length f and radius of curvature r is r = 2f.

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

radius of curvature = 2(focal length)

focal length = (radius of curvature) / 2