Question

A plano convex lens a thickness of 4 cm. Its radius of curvature is 20 cm, When its curved surface
is kept on a horizontal surface and viewed from the top, its bottom appears to be raised by 1 cm.
The focal length of the lens

Plss fast
Not full solution only answers
40cm
50cm
60cm
70cm

Answer 1

Answer:

the answer is 50 cm

Explanation:

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