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An object lies 90cm in air avove water s...

An object lies `90cm` in air avove water surface. It is viewed form water nearly normally. Find the apparent height fo the object.

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`d' = (d)/(n_(rel)) = (d)/(n_(i)//n_(r)) = (90)/((1)/(4//3)) = (90xx4)/(3) cm = 120cm`
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