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Vectronix
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Can anyone tell me what Maxwell said is the source of electromagnetic waves? I read that accelerating charges produce EM waves; are there any other sources?
Born2bwire said:In classical electromagnetics, no. In classical electromagnetics, only charges and currents are the available sources. In quantum theory we allow for other sources such as the change in energy state of an atom or phonon which emit photons when the excited state drops down to a lower energy state.
Electromagnetic waves are a type of energy that can travel through space and can be produced by the movement of electrically charged particles.
The source of electromagnetic waves is the movement of electrically charged particles. This can include the movement of electrons in atoms, the flow of electric current through a wire, or the vibrations of charged particles in an antenna.
Electromagnetic waves are created when electrically charged particles accelerate or vibrate. This results in a disturbance in the electric and magnetic fields, which propagates through space as an electromagnetic wave.
The speed of electromagnetic waves is approximately 299,792,458 meters per second, which is the speed of light in a vacuum. This is a fundamental constant in physics and is denoted by the letter "c".
There are seven different types of electromagnetic waves, listed in order of increasing frequency and energy: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type has a different wavelength and can have different effects on matter.