OnlineCBT
Physics · PYQ NEET UG 2017
हिन्दीThe de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature \( T \) (Kelvin) and mass \( m \), is:
Correct answer · Option B
\( \frac{h}{\sqrt{3mkT}} \)
Explanation
Kinetic energy \( E = \frac{3}{2}kT \). De-Broglie wavelength \( \lambda = \frac{h}{\sqrt{2mE}} = \frac{h}{\sqrt{3mkT}} \).
