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 the ratio of the sine of angle of incidence to the sine of angle of refraction is a constant

$\frac{s i n i}{s i n r} = c o n s t a n t$

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