A) \[3\times {{10}^{8}}m/s\]
B) \[2\times {{10}^{8}}m/s\]
C) \[1.5\times {{10}^{8}}\text{ }m/s\]
D) \[6\times {{10}^{8}}m/s\]
E) \[5\times {{10}^{7}}m/s\]
Correct Answer: B
Solution :
Speed of light is given by \[v=\frac{c}{n}=\frac{3\times {{10}^{8}}}{1.5}=2\times {{10}^{8}}m/s\]
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