. What do you mean by Electromagnetic waves
Wave theory was given by C. Huygens. In 1856, James Clark Maxwell stated that light, X-rays, -rays and heat etc. emit energy continuously in the form of radiations or waves and the energy is called radiant energy. These waves are associated with electric and magnetic fields and are, therefore, known as electromagnetic waves (or radiations). A few important characteristics of these waves are listed:
i. They emit energy continuously in the form of radiations or waves.
ii. The radiations consist of electric and magnetic fields which oscillate perpendicular to each other and also perpendicular to the direction in which the radiations propagate.
iii. All the electromagnetic waves travel with the velocity of light .
iv. These rays do not require any medium for propagation.
v. They are not affected by electric or magnetic fields.