Snell’s law of refraction is given by;

Sin i = (Sin r)²

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Sin i = k (Sin r) [k = constant]

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Cos i = k Cos r

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None of these

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Solution

The correct option is B
Sin i = k (Sin r) [k = constant]

Snell’s law suggests that ratio of the sine of angle of incidence to the sine of angle of refraction is a constant

$\frac{S i n i}{S i n r} = K$

where K is constant.

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i

r

\hat{i}

\hat{j}

\hat{k}

\frac{(cos 2 θ - i sin 2 θ)^{4} (cos 4 θ + i sin 4 θ)^{- 5}}{(cos 3 θ + i sin 3 θ)^{- 2} (cos 3 θ - i sin θ)^{- 9}} = cos 7 k θ - i sin 7 k θ

k

$\frac{1 - i}{1 + i}$ is equal to

According to the law of reflection :

(a) i/r = constant

(b) sin i/sin r = constant

(d) i = r

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