ACADEMIC PRESS SERIES IN ELECTROMAGNETISM
Electromagnetism is a classical area of physics and engineering
which still plays a very important role in the development of new tech-
nology. Electromagnetism often serves as a link between electrical engi-
neers, material scientists, and applied physicists. This series presents
volumes on those aspects of applied and theoretical electromagnetism
that are becoming increasingly important in modem and rapidly devel-
oping technology. Its objective is to meet the needs of researchers, stu-
dents, and practicing engineers.
This is a volume in
ELECTROMAGNETISM
ISAAK MAYERGOYZ, SERIES EDITOR
UNWERSITY OF MARYLAND, COLLEGE PARK, MARYLAND