A) \[600\,\overset{o}{\mathop{A}}\,\]
B) \[0.9~{{10}^{-12}}m\]
C) \[7\,\overset{o}{\mathop{A}}\,\]
D) 0.9 nm
Correct Answer: B
Solution :
According to de-Broglie hypothesis \[\lambda =\frac{h}{p}\] \[=\frac{h}{\sqrt{2\,mE}}=\frac{h}{\sqrt{2\,mqV}}\] \[\therefore \] \[\lambda =\frac{6.6\times {{10}^{-34}}}{\sqrt{2\times (1.6\times {{10}^{-27}})(1.6\times {{10}^{-19}})\times 1000}}\] \[=\frac{6.6\times {{10}^{-34}}}{7.16\times {{10}^{-22}}}\] \[=0.9\times {{10}^{-12}}m\]
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