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The radii of curvature of each surface o...

The radii of curvature of each surface of a convex lens is `20 cm` and the refractive index of the material of the lens is `3//2` (i) Calculate its focal length (ii) If this is cut along the plane `AB`. What will be formed ? (iii) What happens if the lens is cut along `CD` ?

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The correct Answer is:
(i) 20 cm (ii) 40 cm (iii) f remains
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