A) 37.5 eV
B) 75 eV
C) 150 eV
D) 30 eV
Correct Answer: A
Solution :
\[\lambda =\frac{12.27}{\sqrt{V}}\] \[V=\frac{{{(12.27)}^{2}}}{{{\lambda }^{2}}}=\frac{150}{{{\lambda }^{2}}}\] \[E=V\,eV=37.5\,eV\]
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