A) \[1.1\times {{10}^{18}}Hz\]
B) \[1.5\times {{10}^{18}}Hz\]
C) \[1.2\times {{10}^{18}}Hz\]
D) \[1.8\times {{10}^{18}}Hz\]
Correct Answer: D
Solution :
\[h{{v}_{\max }}\,=eV\] \[{{v}_{\max }}\,=\frac{6.6\times {{10}^{3}}\,\times 1.6\,\times {{10}^{-19}}}{6.6\times {{10}^{-34}}}\] \[=1.6\,\times {{10}^{18}}Hz\]. Ans. Maximum possible frequency is \[1.6\times {{10}^{18}}Hz\]. Hence \[1.8\,\times {{10}^{18}}Hz\] is not possible.
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