Reflections from a plasma sphere and relationship between plasma frequency and the classical electron radius

Abstract

Plasma frequency, ωp, may be expressed in terms of the classical electron radius re by the relationship: ωp2=4πc2Nre. The use of this relationship permits the reflection cross section of a spherical cluster of electrons to be expressed in terms of electron radius, when this is convenient, or alternately, in terms of macroscopic quantities such as plasma frequency and the radius of the electron cluster.