Looking for classes? Ksquare Career Institute, Bengaluru →
The mean free path for a gas, with molecular diameter $d$ and number density $n$ can be expressed as:
A
$\frac{1}{\sqrt{2}\,n\pi d^2}$
B
$\frac{1}{\sqrt{2}\,n^2\pi d^2}$
C
$\frac{1}{\sqrt{2}\,n^2\pi^2d^2}$
D
$\frac{1}{\sqrt{2}\,n\pi d}$