Richard Clark wrote:
Cecil Moore wrote:
some people use that exact same argument to try to prove
that no current is flowing in the middle of a transmission line

Or uncanceled reflections brighter than the sun are black.

In a lossless system sourced by monochromatic
coherent light, if the 1st medium is air and if the
index of refraction of the 3rd medium is the square of
the index of refraction of the 1/4WL 2nd medium, then
all reflections are canceled in the 1st medium. That's
one of the rules of optics for non-reflective coatings.
--
73, Cecil http://www.qsl.net/w5dxp

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