What determines the spatial amplitude of the electric field of a linearly polarized electromagnetic wave, and what determines the electric field strength?

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What determines the spatial amplitude of the electric field of a linearly polarized electromagnetic wave, and what determines the electric field strength? [Copy link]

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What determines the spatial amplitude of the electric field of a linearly polarized electromagnetic wave, and what determines the electric field strength? Of course, for the same electromagnetic wave, if its electric field strength is large, then the amplitude of its electric field in space should also be correspondingly smaller. Is this correct?

maychang

[What determines the spatial amplitude of the electric field of a linearly polarized electromagnetic wave, and what determines the electric field strength?]

The question is not very clear.

The electric field strength at a certain point in the electromagnetic wave field changes with time. When we say "amplitude", we are not considering the change of the electric field strength with time, but only considering the maximum value of the electric field strength at that point in the polarization direction. This is obviously the nature of the electromagnetic wave itself.

The electric field strength of an electric field is a property of the electric field itself. The physical quantity electric field strength is used to describe this property of the electric field.