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A ray of light is incident at $30^{\circ}$ from a medium of refractive index 2 into a medium of refractive index 1 , then the angle of refraction is
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Verified Answer
The correct answer is:
$90^{\circ}$
By Snell's law
$2 \sin 30^{\circ}=1 \sin r$
$\Rightarrow \sin r=1 \Rightarrow r=90^{\circ}$
$2 \sin 30^{\circ}=1 \sin r$
$\Rightarrow \sin r=1 \Rightarrow r=90^{\circ}$
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