Question

A) diff bw mechanical and electromagnetic wave b) define transverse and longitudinal waves with example. Also explain the 2 larts of longitudinal. No short answer plz waves 11 class

Answer 1

Heya friend,

Here we go !

a)

1) Mechanical waves - These waves require a material medium for their propagation.

Electromagnetic waves - These waves do not require any medium for their propagation.

2) Mechanical waves - These waves are produced by the vibrations of the particle of the medium.

Electromagnetic waves - These waves are produced due to varying electric and magnetic field.

3) Mechanical waves - These waves have low speed and their speed varies.

Electromagnetic waves - They travel with the speed of light (3 × $10^{8}$ m/s) and their speed is constant.

4) Mechanical waves - These waves have low frequency and large wavelength

Electromagnetic waves - These waves have high frequency and short wavelength.

5) Mechanical waves - These waves can be either transverse or longitudinal.

Electromagnetic waves - These waves are always transverse.

Examples :-

Mechanical waves - Sound wave

Longitudinal waves - Gamma rays, Radiowave    

b)

TRANSVERSE WAVES -

The wave motion in which particles of the medium execute S.H.M. about their mean position in a direction perpendicular to the direction of propagation of wave motion.

Example - Ripples in water

LONGITUDINAL WAVES -

A wave in which particles of the medium execute S.H.M. about their mean position along the same direction along which the wave propagates.

Example - Sound wave

2 parts of longitudinal waves are :-

• Compression - Region of the medium in which the distance between the particles becomes less than the normal distance because of which volume decreases and density increases.

• Rarefaction - Region of the medium where particles are father apart than their normal distance. Here, volume increases and density decreases.

Thanks !!!

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