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Published online by Cambridge University Press: 09 March 2009
In this article, we derived new formulas for approximate representation of components of a plane electromagnetic wave in heterogeneous medium that has parameters changing along some fixed direction in an arbitrary manner. The formulas differ from ordinary WKB approximation by factors regarding relative rate of medium characteristics change and give solutions remaining continuous at turning points. Conditions of full opaque and of no reflectionbased on the solution are obtained.