At temperature T, the average kinetic energy of any particles is $\large\frac{3}{2}$KT . The de Brogile wavelength follows the order :

Question

$\begin{array}{1 1} \text{Thermal proton > Visible photon > Thermal electron} \\ \text{Thermal proton > Thermal electron > Visible photon } \\ \text{Visible proton > Thermal electron > Thermal electron } \\ \text{Visible proton > Thermal neutron > Thermal electron } \end{array}$