Practice portal › Electromagnetic Waves › Maxwell's Equations and the Production of EM Waves
Asked in GUJCET 2026 · Sources: the accelerated charge and Hertz
Idea: an oscillating charge accelerates all the time, and an accelerating charge radiates. At a distant point the fields follow the motion of the charge cycle for cycle.
So one complete oscillation of the charge produces exactly one complete cycle of the electromagnetic wave.
The frequency of the radiation is therefore equal to the frequency of oscillation, with no factor of two or one-half either way.
Here the charge oscillates at 8×10⁹ Hz, so the wave produced has frequency 8×10⁹ Hz.
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