A) \[5\times {{10}^{14}}Hz\]
B) \[5\times {{10}^{12}}Hz\]
C) \[5\times {{10}^{15}}Hz\]
D) \[5\times {{10}^{6}}Hz\]
Correct Answer: A
Solution :
Using the formula for frequency \[n=\frac{c}{\lambda }=\frac{3\times {{10}^{8}}}{6000\times {{10}^{-10}}}=5\times {{10}^{-14}}Hz\]
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