A) \[1.5\times {{10}^{8}}m/s\]
B) \[2\times {{10}^{8}}m/s\]
C) \[3\times {{10}^{8}}m/s\]
D) \[0.75\times {{10}^{8}}m/s\]
Correct Answer: A
Solution :
[a] \[\mu =\frac{1}{\sin \,C}=\frac{1}{\sin \,30{}^\circ }=\frac{1}{1/2}=2\] Velocity of light in the medium \[=\frac{3\times {{10}^{8}}}{2}=1.5\times {{10}^{8}}m/\sec \]
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