Electromagnetic waves and communication System

 Electromagnetic waves and communication System

Communication System
Photo by Dušan veverkolog on Unsplash

Introduction :In today's era we have made it possible to communicate with the people at long distance within moment. This is all possible only due to advancement in the field of telecommunication. This communication is possible only with the help of electromagnetic waves. In this chapter we are going to learn more about electromagnetic wave and how this communication is possible with the help of EM Waves.

Electromagnetic Wave
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Electromagnetic waves: The waves which do not require a magnetic medium is called as electromagnetic waves.

Properties of Electromagnetic Waves : 

1) The Electric field E and B are perpendicular to each other and the direction of propagation of wave are also perpendicular to each other.

2) The electromagnetic waves are formed by accelerated charges particles.

3) The  vector product of E and B gives the direction of propagation of wave .

4) The velocity of waves is equal to velocity of visible light which is equal to 3 x 10⁸ m/s.

5) The velocity of waves is given by  c = 1 / √μ₀ε₀ where μ₀= (4π×10^-7 Tm/A) is permeability and ε₀ = (8.85×10^-12C² /Nm²) is permittivity of free space. 

6) The ratio of amplitude of the electric and magnetic field is always constant at a point and  is equal to velocity of the wave.

7) The energy of EM waves is distributed equally between the electric and  magnetic fields. I_E = I_B

 _{│Electromagnetic Spectrum>>>│}