describe in brief with the aid of a labelled diagram an experiment to demonstrate that a material medium is necessary for the propagation of sound
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Answer: Activity:
Take a glass bell jar, connect it with vacuum pump and suspend an electric bell in it.
Connect electric bell with a battery.
Switch on the electric bell and hear the sound of bell.
Now remove the air completely from the bell jar using vacuum pump and observe the sound of electric bell.
It is observed that sound of electric bell does not come out after pumping out air from the bell jar.
This happens because after creating vacuum in the bell jar there were no air present through which sound wave can propagate.
This experiment shows that without medium sound cannot propagate and hence for the propagation of sound medium must be present.
Take a glass bell jar, connect it with vacuum pump and suspend an electric bell in it.
Connect electric bell with a battery.
Switch on the electric bell and hear the sound of bell.
Now remove the air completely from the bell jar using vacuum pump and observe the sound of electric bell.
It is observed that sound of electric bell does not come out after pumping out air from the bell jar.
This happens because after creating vacuum in the bell jar there were no air present through which sound wave can propagate.
This experiment shows that without medium sound cannot propagate and hence for the propagation of sound medium must be present.
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describe in brief with the aid of a labelled diagram an experiment to demonstrate that a material medium is necessary for the propagation of sound
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