What Is The Electromagnetic Wave Theory?

What are the main points of electromagnetic wave theory?

The main points of this theory are: 1)The energy is emitted from any source continuously in the form of radiations and is called the radiant energy.

2)The radiations consist of electric and magnetic fields oscillating perpendicular to each other and both perpendicular to the direction of propagation of the radiation..

What is the effect of electromagnetic waves on human body?

The main effect of radiofrequency electromagnetic fields is heating of body tissues. There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health.

Where do we use electromagnetic waves?

Radio waves are used for communication such as television and radio. Radio waves are transmitted easily through air. They do not cause damage if absorbed by the human body, and they can be reflected to change their direction. These properties make them ideal for communications.

How does electromagnetic wave behave?

Light waves across the electromagnetic spectrum behave in similar ways. When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of the light.

What is the strongest electromagnetic wave?

Gamma raysGamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.

How much frequency is harmful for humans?

The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently when the whole body is exposed.

Which color has the highest energy?

violetRed is the lowest energy visible light and violet is the highest.

Who are the scientist of electromagnetic wave theory?

In the 1860’s and 1870’s, a Scottish scientist named James Clerk Maxwell developed a scientific theory to explain electromagnetic waves. He noticed that electrical fields and magnetic fields can couple together to form electromagnetic waves.

What is the most dangerous type of electromagnetic wave explain?

Most forms of EMR can be dangerous; however the most dangerous form of Electromagnetic radiation has the most energy. This radiation is called gamma rays. Gamma rays are emitted by the nucleus of an atom and can go through 6 feet of concrete, as well as damage your DNA!

Why is it called electromagnetic?

Electromagnetic waves are produced by the motion of electrically charged particles. These waves are also called “electromagnetic radiation” because they radiate from the electrically charged particles. They travel through empty space as well as through air and other substances.

What are three sources of electromagnetic waves on earth?

Sources of Electromagnetic Waves Electromagnetic waves travel from the sun to Earth across space and provide virtually all the energy that supports life on our planet. Many other sources of electromagnetic waves depend on technology. Radio waves, microwaves, and X rays are examples.

Why electromagnetic wave can travel in vacuum?

In theory, an EM wave can travel forever. Because they do not need a medium, EM waves can pass through outer space, which is a near vacuum. Also, because they do not give up energy in traveling, EM waves can cross the great distances that separate stars and galaxies.

How are electromagnetic waves produced?

An electromagnetic wave can be created by accelerating charges; moving charges back and forth will produce oscillating electric and magnetic fields, and these travel at the speed of light.

Why electromagnetic wave is important?

Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.

Is an electromagnetic wave?

Definition: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. … They are hence known as ‘electromagnetic’ waves. The electric field and magnetic field of an electromagnetic wave are perpendicular (at right angles) to each other.

What are the 4 types of waves?

Following are the different types of electromagnetic waves:Microwaves.X-ray.Radio waves.Ultraviolet waves.

What are the 7 electromagnetic waves and their uses?

The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

How do we use electromagnetic waves in everyday life?

Radio waves are used for communications and radar. Microwaves are used to cook your food. Infrared waves are used in remote controls and are emitted from all warm objects, allowing them to be used to create heat-sensitive cameras.

What are 3 examples of electromagnetic energy?

They include:Radio Waves.TV waves.Radar waves.Heat (infrared radiation)Light.Ultraviolet Light (This is what causes Sunburns)X-rays (Just like the kind you get at the doctor’s office)Short waves.More items…

What are the 7 electromagnetic waves?

The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.

Who is the father of electromagnetism?

Faraday: Father of electromagnetism.