The mean free path for a gas, with molecular diameter and number density can be expressed as [2020]

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Solution

Q.
The mean free path for a gas, with molecular diameter $d$ and number density $n$ can be expressed as [2020]

1 $\frac{1}{\sqrt{2} n π d}$

2 $\frac{1}{\sqrt{2} n π d^{2}}$

3 $\frac{1}{\sqrt{2} n^{2} π d^{2}}$

4 $\frac{1}{\sqrt{2} n^{2} π^{2} d^{2}}$

Ans.
(2)

Mean free path for a gas, $λ = \frac{1}{\sqrt{2} n π d^{2}}$

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