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Cite an experiment to show that sound needs a material medium for its propagation.
To do:
To cite an experiment to show that sound needs a material medium for its propagation.
Objects required:
An air-tight jar, a ringing bell, and a vacuum pump.
Experiment:
Let us do an experiment in two actions to show that sound needs a material medium for its propagation:
Action 1:
Let us place a bell in an airtight jar and ring the bell.
Observation:
On ringing the bell, the sound is heard clearly. Hearing this sound proves that sound can travel in the air as the air is present in the jar.
Action 2:
Let us place a bell in an air-tight jar that is connected to a vacuum pump. Let us ring the bell.
Observation:
We do not hear any sound. On observation, it is found that sound is not bearable even after ringing the bell placed in an air-tight jar that is connected to a vacuum pump. It means that sound cannot travel in a vacuum.
Conclusion: