The Brewster's angle for an interface should be [2020]

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Solution

Q.
The Brewster's angle $i_{b}$ for an interface should be [2020]

1 $0 ° < i_{b} < 30 °$

2 $30 ° < i_{b} < 45 °$

3 $45 ° < i_{b} < 90 °$

4 $i_{b} = 90 °$

Ans.
(3)

We know, $μ = \tan i_{b}$

As $1 < μ < \infty$ $∴$ $1 < \tan i_{b} < \infty$

$\tan (45 °) < \tan i_{b} < \tan (90 °) or 45 ° < i_{b} < 90 °$

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