Advertisements
Advertisements
Question
Advertisements
Solution
| Longitudinal waves | Transverse waves |
| 1. As it travels through a medium, the particles of the medium vibrate to and fro about their mean positions along the direction of propagation of wave. 2. As the wave propagates through the medium, it causes compressions and rarefactions. 3. In case of longitudinal waves, one wavelength contains one compression and one rarefaction. 4. They can travel through all media i.e. solids, liquids and gases. 5. As the longitudinal wave propagates through a medium, there is change in density of the medium. |
1. As it travels through a medium, the particles of the medium vibrate perpendicular to the direction of propagation of wave. 2. As the wave propagates through the medium, it produces crests and troughs. 3. In case of transverse waves, one wavelength contains one crest and one trough. 4. They can travel only through solids and on the surface of liquids. 5. As the transverse wave travels through a medium, there is no change in density of the medium. |
APPEARS IN
RELATED QUESTIONS
Write true or false for a given statement.
A sound is a form of energy.
Fill in the blank.
________ produces a sensation in ears.
Explain meaning of the terms compression and rarefaction in relation to a longitudinal wave.
A cannon is fired at A (see diagram). An observer at B hears two sounds. The first sound is heard after 1 second and the second 3s after the observer sees the flash. (Velocity of sound = 340 ms−1)
(i) Why does the observer see the flash before he hears the sound?
(ii) Calculate the distance x between the observer and the wall.
Select the correct option:
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called:
A thin metal plate is placed against the teeth of cog wheel. Cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. Calculate:
- frequency of node produced.
- speed of sound, if wavelength is 1.05 m.
- what will be the effect when the speed of cog wheel is doubled?
How do the following factor affect the speed of sound in air?
Moisture in air.
Sound travels in air:
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
A list of mediums is given below.
- wood
- water
- air
- vacuum
In which of these mediums can sound travel?
