Advertisements
Advertisements
Question
What minimum distance is required between the source of sound and the reflecting surface to hear an echo ? Give reason.
Advertisements
Solution
Since sound has to travel an equal distance in going up to the reflecting surface and in coming back from the reflecting surface, therefore it must travel nearly 33/2 = 16.5 m either way. Thus, to hear the echo clearly in air, the reflecting surface should be at a minimum distance of 16.5 m from the source of sound.
APPEARS IN
RELATED QUESTIONS
Explain how sound is produced by your school bell.
What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed?
A tuning fork has a number 256 marked on it. What does this number signify?
If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?
Draw the sketches of two waves A and B such that wave A has twice the wavelength and half the amplitude of wave B.
In the sound wave produced by a vibrating turning fork shown in the diagram, half the wavelength is represented by :
What is vibration?
Describe an experiment to show that sound cannot travel through vaccum.
You and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Infrasound can be heard by
