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Ratio of radius of curvature to focal length.

The relation between focal length f and radius of curvature R of a spherical mirror is.

A concave mirror has radius of curvature of 30 cm. Find its focal length

Write the relationship between focal length and radius of curvature.

Reflection Of Light Through Curved Surfaces|Spherical Mirror|Two Types Of Spherical Mirrors|Important Terms Used In Spherical Mirrors|Relation Between Radius Of Curvature And Focal Length|Practice Exercise Questions|Summary

What is the relation between focal length and radius of curvature of a concave mirror? Does the same relation hold for a covcave mirror?