A) 700 m/s
B) 1000 m/s
C) 1400m/s
D) 2800 m/s
Correct Answer: C
Solution :
Momentum, \[p=mv=\frac{h}{\lambda }\] \[v=\frac{h}{m\lambda }\] \[\therefore \] \[v=\frac{6.62\times {{10}^{-34}}}{9.1\times {{10}^{-31}}\times 5.2\times {{10}^{-7}}}\] \[\Rightarrow \] \[v=\frac{6.62\times {{10}^{4}}}{9.1\times 5.2}\] \[\Rightarrow \] \[v=1.4\times {{10}^{3}}\,m/s\] \[\Rightarrow \] \[v=1400\,m/s\]
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