Average distance travelled by a moving particle between impacts with other particles
In physics, mean free path is the average distance over which a moving particle (such as an atom, a molecule, or a photon) travels before substantially changing its direction or energy (or, in a specific context, other properties), typically as a result of one or more successive collisions with other particles.
In physics, meanfreepath is the average distance over which a moving particle (such as an atom, a molecule, or a photon) travels before substantially...
The inelastic meanfreepath (IMFP) is an index of how far an electron on average travels through a solid before losing energy. If a monochromatic, primary...
there are no interactions, thus the meanfreepath should be infinite. The Drude model considered the meanfreepath of electrons to be close to the distance...
collide with each other. The meanfree time for a molecule in a fluid is the average time between collisions. The meanfreepath of the molecule is the product...
(Kn) is a dimensionless number defined as the ratio of the molecular meanfreepath length to a representative physical length scale. This length scale...
vibrational molecular motions. In this same work he introduced the concept of meanfreepath of a particle. In 1859, after reading a paper about the diffusion of...
the meanfreepaths were found to be limited by "internal boundary scattering" to length scales of 10−2 cm to 10−3 cm. The phonon meanfreepath has been...
Free molecular flow describes the fluid dynamics of gas where the meanfreepath of the molecules is larger than the size of the chamber or of the object...
when the scale length of a system is comparable to or smaller than the meanfreepath of the particles involved. An example of this is in a long pore with...
macroscopic cross section Σ: R = Σ Φ {\displaystyle R=\Sigma \,\Phi } The meanfreepath λ of a random particle is the average length between two interactions...
space Optical path length, the product of the distance light travels and the refractive index of the medium it travels through Meanfreepath, the average...
scattering event. Kinetic diameter is related to the meanfreepath of molecules in a gas. Meanfreepath is the average distance that a particle will travel...
container through a hole of diameter considerably smaller than the meanfreepath of the molecules. Such a hole is often described as a pinhole and the...
successively lower frequencies as atmospheric pressure decreases, or as the meanfreepath increases. For this reason, the concept of speed of sound (except for...
obey Newton's second law of motion at non-relativistic speeds. The meanfreepath of a particle can be described as the average length that the particle...
bidirectional scattering distribution function (BSDF), S-matrices, and meanfreepath. When radiation is only scattered by one localized scattering center...
molecules between collisions (meanfreepath) is greater than the diameter of the receptacle that contains it. If the meanfreepath is much greater than the...
molecules experience one collision on average, then at this position the meanfreepath of a molecule is equal to one pressure scale height. This is shown in...
total interaction cross section σ (typically measured in barns), the meanfreepath of a prompt neutron is ℓ − 1 = n σ {\displaystyle \ell ^{-1}=n\sigma...
momentum-transfer meanfreepath and the momentum-transfer collision frequency are difficult to calculate. Many other meanfreepaths can be defined. In...
1 {\displaystyle 1} . The quantity λ {\displaystyle \lambda } , the meanfreepath, measures the average distance a molecule travels between collisions...
proportional to the meanfreepath. Knudsen diffusion occurs when the pore diameter is comparable to or smaller than the meanfreepath of the molecule diffusing...
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