Question

A convex mirror and convex lens of focal length 20cm are placed co axially the distance between convex lens and mirror is 25cm

Answer 1

Answer -

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• As the final image due to the combination coincides with the object itself, the rays reflected from convex mirror must be retracting their path. This can happen only when rays refracted from convex lens tend to meet at centre of curvature of convex mirror. .f=150/9=16.67cmf = 150//9.

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