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  4. To a fish under water, viewing obliquely a fisherman standing on the bank of a lake, the man looks

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Q. To a fish under water, viewing obliquely a fisherman standing on the bank of a lake, the man looks

KCETKCET 2006Ray Optics and Optical Instruments

Solution:

When a ray from man $O$ in air (rarer medium) goes to water (denser medium), then it bends towards the normal. Extend $M N$ backwards meet at point $O'$. Therefore, it appears' to the fish as if the man is taller than what he actually is.

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