Mean Free Path in Particle Physics
In particle physics the concept of the mean free path is not commonly used, being replaced by the similar concept of attenuation length. In particular, for high-energy photons, which mostly interact by electron-positron pair production, the radiation length is used much like the mean free path in radiography.
Read more about this topic: Mean Free Path
Famous quotes containing the words free, path, particle and/or physics:
“I done et so free o’ fish, my stommick rises and falls with the tide.”
—For the State of Florida, U.S. public relief program (1935-1943)
“Imagination places the future world for us either above or below or in reincarnation. We dream of travels throughout the universe: is not the universe within us? We do not know the depths of our spirit. M The mysterious path leads within. In us, or nowhere, lies eternity with its worlds, the past and the future.”
—Novalis [Friedrich Von Hardenberg] (1772–1801)
“The way to learn German, is, to read the same dozen pages over and over a hundred times, till you know every word and particle in them, and can pronounce and repeat them by heart.”
—Ralph Waldo Emerson (1803–1882)
“He who is conversant with the supernal powers will not worship these inferior deities of the wind, waves, tide, and sunshine. But we would not disparage the importance of such calculations as we have described. They are truths in physics because they are true in ethics.”
—Henry David Thoreau (1817–1862)