Mean Free Path

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.

Read more about Mean Free Path:  Derivation, Mean Free Path in Kinetic Theory, Mean Free Path in Radiography, Mean Free Path in Particle Physics, Mean Free Path in Nuclear Physics, Mean Free Path in Optics, Mean Free Path in Acoustics, Examples

Famous quotes containing the words free and/or path:

    We placed the wreaths upon the splended granite sarcophagus, and at its feet, and felt that only the earthly robe we loved so much was there. The pure, tender, loving spirit which loved us so tenderly, is above us—loving us, praying for us, and free from all suffering and woe—yes, that is a comfort, and that first birthday in another world must have been a far brighter one than any in this poor world below!
    Victoria (1819–1901)

    For I must tell you that we artists cannot tread the path of Beauty without Eros keeping company with us and appointing himself as our guide.
    Thomas Mann (1875–1955)