ABSTRACT
This chapter outlines a method for treating more complicated problems with regard to general scattering, and starts from Maxwell's equations in vacuum. The optical theorem relates the total cross section for scattering to the forward scattering amplitude. The optical theorem is derived under restricted conditions. The total cross section is proportional to the imaginary part of the forward scattering amplitude. The chapter discusses scattering of radiation by an electron bound by a harmonic oscillator potential and explains born approximation for scattering by dielectric. For radiation of a definite frequency, Maxwell's equation involving the displacement current is considered.
