A student designed an experiment with the help of a bell jar, vacuum pump and an electric bell to prove that sound needs a material medium to travel. But unfortunately, he could not succeed in attaining his goal. How would you help him to modify the experiment so that he can achieve his aim?
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Answer:
What is bell jar experiment?
Explanation:
The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. ... This demonstrates that the sound wave cannot travel through vacuum. That is, a sound wave needs a material medium for its propagation.
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