Questions
A lens of refractive index n is put in a liquid of refractive index n' of focal length of lens in air to its focal length in liquid will be
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Correct option is A
1f=n−111R1−1R2and 1f'=n−n'n'1R1−1R2∴f'f=n−11×n'n−n'⇒f'=fn'n−1n'−nSimilar Questions
Image of the sun is formed by a binconvex lens of focal length f. The image is a circular patch of radius r and is formed on the focal plane of the lens. Choose the correct statement from the following
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