Obtain the de- Broglies wave length of a neutron of kinetic energy $150\;ev$ would a neutron beam of same energy be equally suitable for crystal diffraction experiments ? Explain given $m_n= 1.6 \pi \times 10^{-27}\;kg$

Question

$\begin{array}{1 1} \text{The de-Broglie wave length of the neutron beam of energy 150 ev is greater than the inter atomic spacing, hence it is suitable for diffraction experiment } \\ \text{The de-Broglie wave length of the neutron beam of energy 150 ev is lesser than the inter atomic spacing, hence it is not suitable for diffraction experiment } \\\text{The de-Broglie wave length of the neutron beam of energy 150 ev is equal to the inter atomic spacing, hence it is suitable for diffraction experiments } \\ \text{None of the above}\end{array} $