A) \[{{10}^{-5}}\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[1.852\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[0.5\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[0.7\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: B
Solution :
[b] \[E=eV=2\times {{10}^{6}}\times 1.6\times {{10}^{-19}}J\] \[\Rightarrow \lambda =\frac{hc}{E}=\frac{6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}{3.2\times {{10}^{-13}}}={{10}^{-2}}\overset{\text{o}}{\mathop{\text{A}}}\,\]
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