The mean free path for gas with molecular diameter d and number density n can be expressed as:

Options

A. ` (1)/(sqrt2) n pi d^(2))`
B. ` (1)/(sqrt2n^(2) pid^(2))`
C. ` (1)/(sqrt2 n^(2) pi^(2) d^(2))`
D. ` (1)/(sqrt2 n pi d)`

Answer

A

Explanation

According to the formula
` lambda = (1)/( sqrt2n pi d^(2))`