. Describe through an activity that sound needs medium to travel.
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The experiment is done by placing an electrical bell in the bell jar. ... However, the sound is not audible to our ears because of the vacuum inside the jar. 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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you can place an electric bell in the bell jar where there is no air (that is vaccum),then make the bell run.You will find that no sound will be heard ,this is because sound needs a medium for its travel
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