EntityQ756307· pop 32· linked from 219 articlesmean free pathSign in to saveaverage distance travelled by a moving particle between successive impactsConnectionsmoleculeEntitygamma rayEntitycross sectionEntityFermi energyEntityelectrical resistivity and conductivityEntityattenuation coefficientEntityphysicsEntityatomEntityInternational Standard Book NumberEntityatomic numberEntityvacuumEntitynoble gasesEntityopticsEntityX-rayEntityatomic nucleusEntitymass densityEntityphotonEntitypressureEntitydigital object identifierEntityEuler's numberEntityCategoriesScattering, absorption and radiative transfer (optics)Statistical mechanics