The main points of electromagnetic wave theory were : When an electrically charged particle moves under acceleration, alternating electrical and magnetic fields are produced and transmitted. These fields are transmitted in the form of waves. These waves are called electromagnetic waves or electromagnetic radiations.
What are the 4 main properties of electromagnetic waves?
Every form of electromagnetic radiation, including visible light, oscillates in a periodic fashion with peaks and valleys, and displaying a characteristic amplitude, wavelength, and frequency that defines the direction, energy, and intensity of the radiation.
What is the theory of electromagnetic?
Electromagnetism is the phenomenon which deals with the interaction between an Electric field and a magnetic Field. Stationary charges in a system lead to an electric field and moving charges in a system lead to a magnetic field.
What are the main electromagnetic waves?
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.
What is wave theory of electromagnetic radiation?
In 1905, Albert Einstein proposed the wave-particle theory of electromagnetic radiation. This theory states that electromagnetic energy is released in discrete packets of energy—now called photons—that act like waves. After Einstein presented his theory, scientists found evidence to support it.
What are the 6 common properties of electromagnetic radiation?
It consists of Gamma-rays, X-rays, ultraviolet rays, infrared rays, radio waves, microwaves. Electromagnetic radiations have a wide range of frequencies, wavelengths and photon energy levels.
What are electromagnetic waves Class 12?
Electromagnetic waves are those waves in which electric and magnetic field vectors changes sinusoidally and are perpendicular to each other as well as at right angles to the direction of propagation of wave.
How was the electromagnetic wave theory discovered?
About 150 years ago, James Clerk Maxwell, an English scientist, developed a scientific theory to explain electromagnetic waves. He noticed that electrical fields and magnetic fields can couple together to form electromagnetic waves. … Hertz proved the existence of radio waves in the late 1880s.
Why do we study electromagnetic theory?
EM theory is an essential basis for understanding the devices, methods, and systems used for electrical energy. Both electric and magnetic fields are defined in terms of the forces they produce. … EM theory is a vital tool for the design and operation of these lines and the many devices needed to connect to them.
What are the 7 types of electromagnetic waves?
The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays. To tour the electromagnetic spectrum, follow the links below!
What produces an electromagnetic wave?
Electromagnetic waves are produced whenever electric charges are accelerated. This makes it possible to produce electromagnetic waves by letting an alternating current flow through a wire, an antenna. The frequency of the waves created in this way equals the frequency of the alternating current.
What are the uses of electromagnetic waves?
Uses of Electromagnetic Waves
- Radio waves – radio and television.
- Microwaves – satellite communications and cooking food.
- Infrared – Electrical heaters, cooking food and infrared cameras.
- Visible light – Fibre optic communications.
- Ultraviolet – Energy efficient lamps, sun tanning.
- X-rays – Medical imaging and treatments.
What were the main points of electromagnetic wave theory What were its limitations?
Limitations of electromagnetic wave theory
- The phenomena of black body radiation.
- The photoelectric effect.
- The variation of heat capacity of solid as a function of temperature.
- The line spectra of atoms with special reference to hydrogen.
What are EM waves 11th class?
Electromagnetic radiation is a flow of energy in which electrical and magnetic fields vary simultaneously. Radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays and gamma rays are all electromagnetic radiations. … Its wave nature is represented by its velocity, frequency and wavelength.