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Statement of a problem № 3994

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(a) Derive the lens maker's formula 1/f=(n-1)(1/r1-1/r2) for a thin lens. (b) A biconvex lens of plastic of refractive index n = 1.2 is immersed in water (n = 1.33). Would the lens act as a converging lens or diverging lens?

Solution:
(a)  Derive the lens maker's formula 1/f=(n-1)(1/r1-1/r2) for a thin lens. (b)

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