A) \[{{60}^{o}}\]
B) \[{{45}^{o}}\]
C) \[{{30}^{o}}\]
D) None of these
Correct Answer: C
Solution :
By Snells law \[\frac{\sin i}{\sin r}=\frac{{{n}_{2}}}{{{n}_{1}}}\] \[[\because \,\,i=(90-30)]\] \[\frac{\sin {{60}^{o}}}{\sin r}=\frac{\sqrt{3}}{1}\] \[\frac{\sqrt{3}}{2\sin r}=\frac{\sqrt{3}}{1}\] \[\sin r=\frac{1}{2}\] \[\sin r=\sin {{30}^{o}}\] \[r={{30}^{o}}\] So, the angle of refraction at point A is \[{{30}^{o}}\].You need to login to perform this action.
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