According to laws of refraction(Snell's law) :

∠ i = ∠ r

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s i n i = s i n r

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\frac{s i n i}{s i n r}

= constant

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t a n i = t a n r

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Solution

The correct option is C $\frac{s i n i}{s i n r}$ = constant
According to the second law of refraction, also known as Snell's law, the ratio of sine of the angle of incidence to the sine of angle of refraction is a constant for a given pair of media.
$\Rightarrow \frac{sin i}{sin r} = C o n s t a n t$
This constant is known as the refractive index of the medium.
Hence, the correct answer is OPTION C.

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Similar questions

According to the law of reflection :

(a) i/r = constant

(b) sin i/sin r = constant

(d) i = r

In Snell’s law,

$\frac{sin i}{sin r}$ = $\frac{v_{1}}{v_{2}}$ = constant
This constant is called as:

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

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

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