Abstract:
Interaction of radiation plays an important role in determining the optical
properties of matter. In this work amplification of electromagnetic waves
depends on the relation between the external with internal field .It is shown
that amplification exists when the external and internal field are in phase.
When the two field are normal to each other no amplification exists . While
absorption happens when the two fields apposes each other. The internally
generated electric field due to the interaction of matter with electromagnetic
field is usually described by polarization. An alternative way based on the
notion of internal field and current density is introduced here. The
mathematical model is based on RCL circuits and effective values and
complex representations. It shows that the external field induces internal field
perpendicular to it ,beside two current components ,One parallel and the other
is perpendicular to it .The material act as a resister and an inductor connected
in series.
