A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are

Question

Dr. Abubacker · Accepted Answer

(a) $Refractive\ index\ (\mu) = \frac{real\ depth\ }{apparent\ depth}$
$\Rightarrow \mu \propto \frac{1}{\ apparent\ depth\ }$
Since, violet light is refracted the maximum and red light are least, the refractive index is maximum for violet colour and minimum for red colour. Hence, letter which appears minimum raised are red.

Q. A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are

Explanation

Reviewed by Dr. Abubacker

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