The essence of Maxwell's Theory of Electromagnetic Waves
The essence of Maxwell's Theory of Electromagnetic Waves is:
a. Changes in the electric field can produce magnetic fields.
b. Light includes electromagnetic waves.
Careful experiments come to the conclusion:
The electromagnetic wave pattern is the same as the transverse wave pattern with the vector changing electric field perpendicular to the vector changing 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.
Electromagnetic waves are born as a combination of imagination and sharpness of the mind based on the belief in order and neatness of natural rules.
The experimental results that preceded it have revealed three rules of electrical symptoms, including the following.
Coulomb's Law: Electric charges produce strong electric fields.
Biot-Savart Law: The flow of electric charge (current) produces a magnetic field around it.
Faraday's Law: Changes in magnetic fields (B) can cause electric fields (E).
The Nature of Electromagnetic Waves
Changes in electric and magnetic fields occur at the same time.
The direction of the electric and magnetic fields are perpendicular to each other.
The strength of the electric and magnetic fields is directly proportional to each other, that is, according to the relationship E = c.B.
The direction of propagation of electromagnetic waves is always perpendicular to the direction of the electric and magnetic fields.
Electromagnetic waves can travel in a vacuum.
Electromagnetic waves propagate at a rate that depends only on the electrical and magnetic properties of the medium.
The electromagnetic wave propagation rate in a vacuum is a common constant and the value c = 3 x 108 m / s.
Electromagnetic waves are transverse waves.
Electromagnetic waves can undergo processes of reflection, refraction, polarization, interference and diffraction.
Light that is seen by the eye is not merely the type that allows electromagnetic radiation. James Clerk Maxwell's opinion shows that other electromagnetic waves, different from the light visible to the eye in he has wavelengths and frequencies, could have existed. This theoretical conclusion was amazingly strengthened by Heinrich Hertz, who was able to produce and meet the two waves visible to the eye predicted by Maxwell.
A few years later Guglielmo Marconi demonstrated that the invisible waves of the eye could be used for wireless communication so that it became what the name of the radio was. Now, we also use television, X-rays, gamma rays, infrared rays, ultraviolet rays are examples of electromagnetic radiation. Everything can be learned through the results of Maxwell's thoughts.