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प्रश्न
How does sound from a sound producing body travel through air to reach our ears? Illustrate your answer with the help of a labelled diagram.
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उत्तर
When an object vibrates, then the air layers around it start to vibrate in exactly the same way and causes successive compression and rarefaction that carry sound waves from the sound-producing object to our ears.
Example: A tuning fork vibrates and produces sound waves in air. Since the prongs of the tuning fork vibrate, the individual layers of air also start to vibrate, creating successive compression and rarefaction. Sound travels in the form of longitudinal waves in which the back and forth vibrations of the air layers are in the same direction as the movement of sound wave.
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संबंधित प्रश्न
Describe an experiment to show that each source of sound is a vibrating body.
Name two sources of sound.
Describe an experiment to estimate the speed of sound in air.
Which of the following cannot transmit sound? Water, Vacuum, Aluminium, Oxygen gas
Name the physical qantity whose SI unit is 'hertz'.
What should an object do to produce sound?
What is the name of the strings which vibrate in our voice box when we talk?
Give reason for the following :
In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.
A sound producing body is at considerable distance from a man. There can be four different media W, X, Y and Z between the sound producing body and the man. The medium X brings the sound to man most quickly whereas medium Z takes the maximum time. The time taken by medium W in bringing sound to man is less than that of X but more than that of Z. The medium Y, however, fails to bring the sound from the sound producing body to the man. Which medium could be the one :
(a) having on fixed shape and no fixed volume?
(b) having a fixed volume but no fixed shape?
(c) having the same composition as that on the moon?
(d) having a fixed shape and a fixed volume?
______ is produced when an object is set to vibrate.
