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Ram sees his friend Shyam through a thick glass slab $(n = 1.5)$ . Shyam is at a distance of $100 c m$ from him, but he seems to be at a distance of $98 c m$ from himself. What is the thickness of the slab ?

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$5 c m$

$2 c m$

$4 c m$

$6 c m$

answer is C.

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Detailed Solution

$N S = 100 - 98 = 2 m = t 2 = t \Rightarrow t = 6 c m$

Hence option (c) is correct .

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