In a small angled prism, the angle of minimum deviation and the angle of the prism are in the ratio 1 : n. The refractive
index of the material of the prism is

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$\frac{n}{n + 1}$

$\frac{n}{n - 1}$

$\frac{n - 1}{n}$

$\frac{n + 1}{n}$

answer is C.

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Detailed Solution

$\frac{d}{A} = \frac{1}{n}$
$\begin{aligned} d = A (μ - 1) \\ \frac{d}{A} = (μ - 1) \end{aligned} \begin{aligned} \frac{1}{n} = μ - 1 \\ μ = \frac{1}{n} + 1 \\ μ = \frac{1 + n}{n} \end{aligned}$

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