Types of Wave
Category : 8th Class
There are normally two types of waves:
(i) Longitudinal wave
(ii) Transverse wave
The nature of the wave depends on the elastic and inertial properties of the medium.
Longitudinal Waves
It is the wave, in which the particles of the medium vibrates in the direction of propagation of the wave. In this process the particles do not move with the wave, they simply oscillate back and froth about their individual equilibrium position. In the figure given below, the wave is seen as the motion of the compressed region, which moves from left to right. The region in which the particles have high density is called compression and the region in which the particles have low density is called the rarefactions. The distance between any two compressions and rarefactions is called its wavelength.
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Transverse Waves
The wave, in which the particles of the medium vibrates in the direction perpendicular to the direction of their propagation, is called the transverse waves. The particles do not move along the wave, they simply oscillate up and down about their individual equilibrium position, as the wave passes through the medium.
There are different types of waves produced by different sources. The wave produced by the home theater is different from that produced by the light of bulb. What is the nature of sound wave produced by the home theater?
(a) Transverse
(b) Plane
(c) Longitudinal
(d) All of these
(e) None of these
Answer: (c)
Explanation
The nature of the sound wave produced by the home theater is longitudinal.
The wave, which travels in a straight line and cannot bend round the corner is called transverse wave. Which one of the following is an example of transverse wave?
(a) Sound wave
(b) Light
(c) Music
(d) Electromagnetic wave
(e) None of these
Answer: (b)
Explanation
We know that light wave is transverse in nature.
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