Question

When the de-Broglie wavelength of neutron and electron are same, what will be their corresponding momenta?

• A. Neutron has higher momentum than electron.
• B. They both have equal momentum
• C. Electron has higher momentum than neutron.
• D. Information is insufficient to answer the question.

Answer 1

The correct option is B They both have equal momentum

The de-Broglie wavelength is given by,
$\lambda =\frac{h}{p}$
Here, $h$ is constant.
As ${\lambda }_1={\lambda }_2\Rightarrow p_1=p_2$
So, the momentum of neutron and electron will be same.

Hence, $\left(B\right)$ is the correct answer.