Figure 11. The red line represents the electric field signal, the blue is the magnetic field signal, and the green is the composite Poynting vector of the two, which represents the power signal. It can be seen from the figure that if the electric field and magnetic field maintain a 90-degree phase difference, the power takes a positive value in two quarter cycles and a negative value in the other two quarter cycles. Therefore, the average value is 0. This shows that this electromagnetic wave does not transfer energy and can be regarded as a probability wave

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Energy Conservation Law and Energy Flow Theorem for Transformer, Antenna and Photon

Shuang-ren Zhao

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