What is the relation between radius of curvature and focal length?
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The distance from the pole to the center of curvature is called (no surprise, I hope) the radius of curvature (r). 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.
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The distance from the pole to the center of curvature is called the radius of curvature (r). 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. The relationship between the focal length f and radius of curvature r is r = 2f.
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