A) \[5\times {{10}^{-7}}m\]
B) \[4\times {{10}^{-8}}c{{m}^{-1}}\]
C) \[2\times {{10}^{-7}}{{m}^{-1}}\]
D) \[4\times {{10}^{4}}c{{m}^{-1}}\]
Correct Answer: D
Solution :
Here: Frequency\[(v)=12\times {{10}^{14}}{{s}^{-1}}\]and velocity of light\[(c)=3\times {{10}^{10}}cm\,\,{{s}^{-1}}\] We know that the wave number\[(\bar{v})=\frac{v}{c}=\frac{12\times {{10}^{14}}}{3\times {{10}^{10}}}=4\times {{10}^{4}}\,\,c{{m}^{-1}}\]
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