A) \[90{}^\circ \]
B) \[60{}^\circ \]
C) \[45{}^\circ \]
D) \[30{}^\circ \]
Correct Answer: D
Solution :
Given, velocity of light wave doubles in second medium. Let velocity of light in first medium be v \[\therefore \] Velocity of light in second medium\[=2v\] Now,\[\sin C=\frac{Velocity\,\,in\,\,1st\,\,medium}{Velocity\,\,in\,\,2nd\,\,medium}\] \[\therefore \] \[\frac{v}{2v}=\frac{1}{2}\]\[\Rightarrow \] \[C\mathbf{=3}{{\mathbf{0}}^{\mathbf{o}}}\]
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