The most proable kinetic energy of thermal neutrons at a temperature of T Kelvin, may be taken equal to kT, where k is Boltzmann constant. Taking the mass of a neutron and its associated de-Broglie wavelength as m and `lambda_B` respectively, state the dependence of `lambda_B` on m and t.

Explanation

De-Broglie wavelength,
`lambda=h/p=h/(sqrt(2mK))=h/(sqrt(2mxx(3/2kT)))`
`:. lambda_B prop 1/(sqrt(mT))`