A) \[5\times {{10}^{14}}Hz\]
B) \[5\times {{10}^{17}}Hz\]
C) \[2.5\times {{10}^{14}}Hz\]
D) \[2.5\times {{10}^{7}}Hz\]
Correct Answer: A
Solution :
\[\lambda =600\text{ }nm=600\times {{10}^{-9}}m=6\times {{10}^{-7}}m\] \[c=3\times {{10}^{8}}m/s\] \[v=\frac{c}{\lambda }=\frac{3\times {{10}^{8}}}{6\times {{10}^{-7}}}\] \[=5\times {{10}^{14}}Hz\]
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