The Essence of Maxwell's Theory of Electromagnetic
The Essence of Maxwell's Theory of Electromagnetic Waves is:
Changes in the electric field can produce magnetic fields.
Light includes electromagnetic waves. The speed of electromagnetic wave propagation (c) depends on the permittivity (e) and permeability (μ) of the substance.
According to Maxwell, the propagation speed of electromagnetic waves is formulated as follows:
Electromagnetic Wave Speed Equation
From the above formula it turns out that the velocity of electromagnetic wave propagation depends on the electrical permittivity and magnetic permeability of the medium. So, in general the equation for the velocity of electromagnetic wave propagation for various media is:
the equation of the speed of electromagnetic wave propagation
It turns out that changes in the electric field cause magnetic fields that are not fixed in magnitude or change. So that the change in the magnetic field will produce a changing electric field again.
The process of the electric and magnetic fields takes place together and travels in all directions. The vibrational direction of the electric field and magnetic fields are perpendicular to each other. So electromagnetic waves are waves that result from changes in the magnetic field and electric field in sequence, where the vibrational direction of the electric field vector and the magnetic field are perpendicular to each other.
The propagation of electromagnetic waves as transverse waves
When in the PQ wire If there is a change in voltage or magnitude in the PQ wire, the electrons move back and forth in the PQ wire, in other words in the PQ wire an electric vibration occurs. Changes in voltage cause changes in the electric field in the room around the wire, while changes in electric current cause changes in the magnetic field. Changes in electric and magnetic fields that propagate in all directions.
Because the propagation of changes in magnetic fields and electric fields periodically, the propagation of changes in electric fields and magnetic fields is commonly called electromagnetic waves. (GEM)
Careful experiments come to the conclusion:
Vector changes in perpendicular electric field vector changes in magnetic field Electromagnetic wave patterns are the same as transverse wave patterns with a vector changing electric field perpendicular to a vector changing in a magnetic field.
Electromagnetic waves show symptoms of reflection, refraction, diffraction, polarization as well as light.
Absorbed by the conductor and passed on by the insulator.
Maxwell's prediction of electromagnetic waves was actually proven. It was Heinrich Hertz who proved the existence of electromagnetic waves through his experiments. Hertz's own experiment consists of the generation of electromagnetic waves from an electric dipole (two electrically charged poles with adjacent, positive and negative charges) as transmitters and other electric dipoles as receivers. Transmitter and receiver antennas that currently use the principle like this.