Advertisements
Advertisements
प्रश्न
Explain how the principle of echo is used by
The bat during its flight at
Advertisements
उत्तर
Bats can produce and detect the sound of very high frequency. The bats fly with speed much lower than the speed of sound. The sounds produced by flying bats get reflected from any obstacle in front of it. By hearing the echoes, bats come to know where the obstacles are, even in the dark. So, they can fly safely without colliding with the obstacles. This process of detecting obstacles is called sound ranging.
APPEARS IN
संबंधित प्रश्न
Define wavelength term in relation to a wave.
The following diagram shows three ways in which the string of an instrument can vibrate.
(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
(c) what is the ratio of the frequency of the vibration in (i) and (ii)?
Name the principle on which a soundboard works.
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.
Define the term Frequency (as applied to sound waves)
What are infrasonic waves?
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.
Explain why, the ceilings of concert halls are curved.
