In figure the direct image formed by the...

In figure the direct image formed by the lens (f = 10 cm) of an object placed at O and that formed after reflection from the spherical mirror are formed at the same point 'O'. What is the radius of curvature of the mirror?

Verified by Experts

v= 15 cm. f = 10 cm
` 1/15 - 1/u = 1/10 ` or u = - 30 cm
Distance of O from the mirror = 20 cm.

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