A) 2.5/5000 eV
B) \[2.5/{{(5000)}^{2}}eV\]
C) \[2.5\times 5000\ eV\]
D) \[2.5\times {{(5000)}^{2}}eV\]
Correct Answer: C
Solution :
\[E\propto \frac{1}{\lambda }\Rightarrow \frac{2.5}{E'}=\frac{1}{5000}\Rightarrow E'=(2.5)\times 5000\ eV\]
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