On this slide we show how to regard the magnitude of the stress, by using one wave envelope as "virtual ground."  In the top diagram, the original E-field stress of each wave has a magnitude of 5, and the composite stress wave now has a magnitude of 10, in whatever units we choose to express them. 
           We show in the bottom diagram that during one half cycle we have compressive stress in the virtual particle vacuum flux, and during the second half cycle we have tensile stress. 
           This shows the wave is like a sound wave in the gaseous molecules of the air. 
           However, this wave has one difference.  It also oscillates time, and thus has at least one additional degree of freedom, compared to ordinary EM waves. 
            In fact, this wave can be made n-dimensional and hyperspatial. 
            As a first order approximation, we can treat such a wave in
 a spatial fashion, if the wave is not too great in magnitude and the relativistic oscillation of time and inertia is not too large. 

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