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Q.

Is it true that sound cannot propagate through a vacuum?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
In this experiment, with continuous suction of the air from the bell jar, the sound of the ringing bell weakens. And when all the air gets suctioned from the bell jar, no sound can be heard as a vacuum is created in the bell, which shows that sound cannot propagate through a vacuum.
  
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