A) \[50{}^\circ \]
B) \[60{}^\circ \]
C) \[90{}^\circ \]
D) \[40{}^\circ \]
Correct Answer: C
Solution :
Refraction at P, \[\frac{\sin \,{{60}^{o}}}{\sin \,{{r}_{1}}}=\sqrt{3}\] \[\Rightarrow \] \[\sin \,{{r}_{1}}=\frac{1}{2}\] \[\Rightarrow \] \[{{r}_{1}}={{30}^{o}}\]You need to login to perform this action.
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