Question

write any four characteristics of electromagnetic waves

Answer 1

Four characteristics of electromagnetic waves are :
1. electromagnetic waves are produced by accelerating charge.
2.Electromagnetic waves could not require any
material mediam .
3.electromagnetic waves are transverse in wave.
4.electromagnetic waves travel in free space.

Answer 2

Characteristics of electromagnetic waves

(i) Electromagnetic waves are produced by accelerated charges.

(ii) They do not require any material medium for propagation.

(iii) In an electromagnetic wave, the electric (→E) and magnetic (→B) field vectors are at right angles to each other and to the direction of propagation. Hence electromagnetic waves are transverse in nature.

(iv) Variation of maxima and minima in both →E and →B occur simultaneously.

(v) They travel in vacuum or free space with a velocity 3 × 108 m s-1 given by the relation C = 1/√(μ0ε0)

(μ0 – permeability of free space and ε0 – permittivity of free space)

(vi) The energy in an electromagnetic wave is equally divided between electric and magnetic field vectors.