Question

The momentum of a neutron of wavelength 0.1 nm is

• A. $6.6\times 10^{-24}kgm{s}^{-1}$
• B. $6.6\times 10^{-34}kgm{s}^{-1}$
• C. $6.6\times 10^{-4}kgm{s}^{-1}$
• D. $6.6\times 10^{-14}kgm{s}^{-1}$

Answer 1

Answer: (A)

$\lambda =\frac{h}{p}\Rightarrow$ $p=\frac{h}{\lambda }=\frac{6.6\times 10^{-34}}{0.1\times 10^{-9}}=6.6\times 10^{-24}kgm{s}^{-1}$