Question

characteristics of the electromagnetic waves

Answer 1

CHARACTERS.....
1)Electromagnetic waves are produced by accelerated charges.

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

(iii) In an electromagnetic wave, the electric Vector(E) and magnetic Vector(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 Vector(E) and Vector(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/Root(µoεo)

(µo – permeability of free space and εo - permittivity of free space)

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

(vii) The electromagnetic waves being chargeless, are not deflected by electric and magnetic fields.

Answer 2

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• Electromagnetic waves can be described by means of vibrating electrical and magnetic fields which are mutually perpendicular.
• The nature of these waves is transverse.
• These waves travel with a speed equal to the speed of the light in vacuum.