If d is the average diameter of the molecule, then the mean free path of the molecules between two s

Question

If d is the average diameter of the molecule, then the mean free path of the molecules between two successive collisions is proportional to\

Professor PC Thomas Classes · Answer

The mean free path $\lambda$ is the average distance covered by a molecule between two successive collision and is given by\ $\lambda=\frac{1}{\sqrt{2} \mathrm{n} \pi \mathrm{d}^{2}}$\ where n is the number density and d is the diameter of the molecule.\ $	herefore \lambda=\frac{1}{\mathrm{~d}^{2}}$\