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CONSEQUENCES OF BOUNDARY CONDITIONS
 

In presence of two conductive plates, the electromagnetic field oscillations should satisfy the requirement of zeroing the electric field on the plates themselves.

As a consequence of this condition, in the space between the plates only those oscillations can exist, whose half-wavelength is a SUBMULTIPLE OF THE DISTANCE BETWEEN PLATES.

animazione onde piastre

  N.B. Oscillations BETWEEN the plates and those OUTSIDE of them, in general do not have any phase correlation. In the animation they are represented to oscillate in phase just for simplicity reasons.