Questions
The focal length of a convex lens of refractive index 1.5 is 'f' when it is placed in air. When it is immersed in a liquid it behaves as a converging lens and its focal length becomes xf (x > 1). The refractive index of the liquid is
detailed solution
Correct option is B
f'f=μg-1μgμl-1, f'=xf and x>1 ∴μl<μg⇒μl<32μl is absolute refractive index always >1Talk to our academic expert!
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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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