ELECTROMAGNETIC RADIATION

ELECTROMAGNETIC RADIATION

Electromagnetic Radiation - An electric charge is surrounded by an electric field. If the charge moves, a magnetic field is produced. When the charge undergoes an acceleration or deceleration, the magnetic and the electric fields of the charge will vary. The combined variation of the electric and magnetic fields results in loss of energy. The charge radiates this energy in a form known as electromagnetic radiation. The electromagnetic radiation moves in the form of sinusoidal waves .

"The electromagnetic wave possess wavelength (a), frequency (v) and velocity (c). The distance between two consecutive positive peaks is known as wavelength. The number of cycles of the wave which pass a fixed point per second is known as the frequency of the wave. The velocity of the wave is the distance traveled per second by the wave. The relation between wavelength, frequency and velocity of the electromagnetic wave can be expressed as c - v. All electromagnetic waves, travel at the same velocity in a given medium. In vacuum the velocity is about 2.998 * 108 meter per second.