It has been said that the energy stored in the standing waves
of a transmission line just "sloshes" around.

We can demonstrate standing waves using a laser beam normal to
a perfect mirror. There are points of maximum irradiance and
points of minimum irradiance in the standing waves. So does
the EM energy in the standing waves of light in free space
"slosh" around like the energy in the standing waves in a
transmission line? If so, where does the inductance and
capacitance in free space come from to generate that 377 ohms
of characteristic impedance? If not, then why do the EM waves
in a transmission line behave differently than the EM waves
in free space? What different laws of physics do photonic waves
in transmission lines obey than do photonic waves in free
space? Of the E-field and H-fields rules for EM waves in free
space, which of those rules are violated by EM waves in a
transmission line? Is there one set of Maxwell's equations for
free space and a separate set for transmission lines? Did
Maxwell ever mention the scientific concept of "sloshing"?
--
73, Cecil http://www.qsl.net/w5dxp

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