Which equation not represent Snells law?

\frac{n_{2}}{n_{1}} = \frac{sin θ_{1}}{sin θ_{2}}

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\frac{n_{1}}{n_{2}} = \frac{sin θ_{2}}{sin θ_{1}}

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n_{1} sin θ_{1} = sin θ_{2} n_{2}

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n_{1} sin θ_{2} = sin θ_{2} n_{1}

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Solution

The correct option is D $n_{1} sin θ_{2} = sin θ_{2} n_{1}$
Snell's law:
$\frac{n_{2}}{n_{1}} = \frac{s i n θ_{1}}{s i n θ_{2}}$

Hence, option D is correct.

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