# Relation between radius of curvature & focal length of a convex mirror is.

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Relation between radius of curvature & focal length of a convex mirror is.

(1) $f={R\over2}$

(2) $R={f\over2}$

(3) 2f = 3R

(4) none
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Ray optics and optical instruments, Spherical mirrors

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Ans. (1) $f={R\over2}$
Sol. ${R\over2}=f$