State the characteristics of e.m. waves.

Explanation

Electromagnetic waves : See Very Short Answer Type Question No. 10 (1 Mark). Properties of electromagnetic waves :
(i) These waves can travel in vacuum.
(ii) These are produced by the accelerated charge particles.
(iii) These waves travel with velocity of `3xx10^(8)" ms"^(-1)` in vacuum.
(iv) energy in these waves is equally distributed between electrical and magnetic fields.
(v) The electric field vector `vec(E)` is responsible for the optical effect of em waves and hence known as light vector.