![](https://lms.su.edu.pk/storage/uploads/1588549826-mean-free-path.png)
Week 16; Mean Free Path and Microscopic Calculations of Mean Free Path, Brownian Motion
In physics, the mean free path is the average distance travelled by a moving particle (such as an atom, a molecule, a photon) between successive impacts (collisions),which modify its direction or energy or other particle properties.