NEET Solved Paper 2017 Question 5
Question: The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is
Options:
A) $ \frac{2h}{\sqrt{mkT}} $
B) $ \frac{h}{\sqrt{mkT}} $
C) $ \frac{h}{\sqrt{3mkT}} $
D) $ \frac{2h}{\sqrt{3mkT}} $
Show Answer
Answer:
Correct Answer: C
Solution:
- de-Broglie wavelength $ \lambda =\frac{h}{mv} $ $ =\frac{h}{\sqrt{2m(KE)}} $ $ =\frac{h}{\sqrt{2m(\frac{3}{2}kT)}} $ $ \lambda =\frac{h}{\sqrt{3mkT}} $
