A) \[0.166\times {{10}^{-8}}\,N/{{m}^{2}}\]
B) \[0.332\times {{10}^{-8}}\,N/{{m}^{2}}\]
C) \[0.111\times {{10}^{-8}}\,N/{{m}^{2}}\]
D) \[0.083\times {{10}^{-8}}\,N/{{m}^{2}}\]
Correct Answer: A
Solution :
Intensity or power per unit area of the radiations \[P=fv\]Þ \[f=\frac{P}{v}=\frac{0.5}{3\times {{10}^{8}}}=0.166\times {{10}^{-8}}\,N/{{m}^{2}}\]
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