Thursday, 8 October 2020

Electromagnetic wave propagation


Electromagnetic wave propagation, mechanical waves, and electrostatic waves are two very important ways of transmitting energy around us. Waves in air and sound waves are two examples of mechanical waves. Mechanical waves are caused by a distribution or vibration in matter, solid, gaseous, or plasma. The medium in which the waves propagate is called the medium.


Classical waves transfer energy without moving or relocating matter across the medium. Waves in a pool do not carry water molecules from one point to another, rather the wave energy propagates through the water, leaving the water molecules in their positions.



Electricity can be static, like the energy that can make your hair stand up from the ends

 Magnetism can also be static, as is the magnetism of natural stones.


Electromagnetic wave propagation A change in the magnetic field will be accompanied by a change in an electric field and vice versa. The two things are related. This change in the fields from the electrostatic waves. Electrophoresis differs from mechanical waves in that it does not require a medium to propagate. This means that electromagnetic waves can not only propagate through the air and solid materials but also spread through the vacuum of space.


Scottish scientist James Maxwell developed a scientific theory to explain electromagnetic waves. Note that electric and magnetic fields can combine in binary form to form electromagnetic waves. He summarized the relationship between the two fields as known as Maxwell's equations.


Hertz, a German scientist, applied Maxwell's theories to produce and receive radio waves. The unit of frequency of radio waves - a cycle within a second - is called a hertz, after the German world hertz.


His experiments with radios solved two problems. First, he proved with certainty that the velocity of electrostatic waves is equal to the speed of light. This proved that radio waves are a form of light. Second, Hertz discovered how the magnetic and electric fields could free themselves from wires and release freely in the form of Maxwell's electrodes.


Electromagnetic waves are formed by changing electric and magnetic fields. These fields are spread perpendicular to each other and along a scattering curve.


If the electromagnetic wave is emitted evenly in all directions in the vacuum from a source point, it produces a spherical wavefront, which is called a source point. A wavefront is defined as the plane that joins all points of the same phase.



One of the physical properties of light is that it is polarized. Polarization is the direction of an electric field in an electromagnetic wave.


Description of electromagnetic energy:

Light, electromagnetic waves, and radiation all return under the frame of electromagnetic energy, and this energy can be described in frequency, wavelength, and energy, and any of them can be known with only one knowledge. Usually, radio waves and microwaves are measured at Hertz, infrared and visible light at meter wavelength, and X-rays and gamma are measured with electron volts.

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