Which electromagnetic wave has the greatest amplitude?

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Solution

The amplitude of a wave is the maximum displacement of the oscillatory motion from its equilibrium position. In the case of electromagnetic (EM) waves, the amplitude is determined by the maximum strength of the electric and magnetic fields in the propagating wave.
The amplitude is merely the height of the wave and has no relationship with the wavelength or frequency of a wave.
A larger amplitude means a greater strength of the electromagnetic fields and hence an increase in the intensity of the wave. So, no particular electromagnetic wave has the greatest amplitude.

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