Advertisements
Advertisements
प्रश्न
What is the condition necessary for an echo to be heard distinctly?
Advertisements
उत्तर
Echo is a reflected sound heard after the original sound strikes a rigid obstacle...
The conditions are-
1- The reflecting surface should have a larger reflecting surface than the wavelength of the sound
2- The minimum distance to hear the echo should be 17m in the air or as described by the formula `(Vt)/2`...
संबंधित प्रश्न
Name the characteristic of sound in relation to its waveform
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.
How do bats avoid obstacles in their way, when in flight?
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.
What are infrasonic waves?
Write the approximate value of the speed of sound in iron.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
What is meant by echo depth sounding?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 10 m?
What is mean by the reflection of sound?
