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Physics-

General

Easy

Question

A ray of ligth enters into a glass slab from air as shown .If refractive of glass slab is given by $mu equals A minus B t$ where A and B are constants and ‘t’ is the thickness of slab measured from the top surface. Find the maximum depth travelled by ray in the slab. Assume thickness of slab to be sufficiently large

$\frac{1}{B} (A - \frac{\sqrt{3}}{2})$
$B (A - \frac{\sqrt{3}}{2})$
$\frac{1}{A} (B - \frac{\sqrt{3}}{2})$
$\frac{1}{B^{2}} (A - \frac{\sqrt{3}}{2})$

The correct answer is: $fraction numerator 1 over denominator B end fraction open parentheses A minus fraction numerator square root of 3 over denominator 2 end fraction close parentheses$

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