A) \[2.4\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[4.6\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[0.6\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[1.2\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: D
Solution :
According to de Broglie \[\lambda =\frac{h}{\sqrt{2mE}}\] ...(i) Here, \[E=100eV=100\times 1.6\times {{10}^{-19}}J\] \[=1.6\times {{10}^{-17}}J\] Substituting the given values in eq. (i) we get \[\lambda =\frac{6.6\times {{10}^{-34}}}{\sqrt{2\times 9.1\times {{10}^{-31}}\times 1.6\times {{10}^{-17}}}}\] \[=\frac{6.6}{\sqrt{2\times 9.1\times 1.6}}\times {{10}^{-10}}\] or \[\lambda =1.22\times {{10}^{-10}}m\approx 1.2\overset{\text{o}}{\mathop{\text{A}}}\,\]
You need to login to perform this action.
You will be redirected in
3 sec
