Advertisements
Advertisements
Question
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Advertisements
Solution
- The term "reflection of a sound wave" refers to the return of a sound wave in the same medium when it strikes a surface like a wall, metal sheet, plywood, etc.
- A reflecting surface's size needs to be greater than the sound wave's wavelength in order for a sound wave to reflect.
- A megaphone (also known as a speaking tube), a sound board, and an ear trumpet are examples of devices that exploit sound wave reflection.
APPEARS IN
RELATED QUESTIONS
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which changes.
Explain how is the principle of echo used by
(a) The bat during its flight at night,
(b) The dolphin to locate small fish as its prey.
Point out the waves from the given list, i.e., light, sound, radio waves, ultrasonic waves, and thermal radiation, the energy is propagated by mechanical waves.
What is meant by echo depth sounding?
Name the type of waves that are used for sound ranging. Why are radio waves not audible to us?
A radio signal, sent towards the surface of the moon, is received in 2.5 seconds. If the speed of the radio waves is 3 × 108 ms−1, find the distance of the moon from the earth.
What is mean by the reflection of sound?
