A ray of a light travels from denser medium having refractive index $\sqrt{2}$ to air, what should be the angle of incidence for the ray to emerge out?

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$i = 60^{0}$

$i > 45^{0}$

$i < 45^{0}$

$i > 60^{0}$

answer is A.

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Detailed Solution

$\begin{array}{l} Angle of incidence (i) < critical angle (θ_{c}) \\ {sinθ}_{c} = \frac{1}{μ} = \frac{1}{\sqrt{2}} \Rightarrow θ_{c} = 45^{0} \\ For ray to emerge out \end{array}$

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