Explain Why Sound Cannot Travel In A Vacuum at Traveling

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Explain Why Sound Cannot Travel In A Vacuum. The bell jar is connected to a vacuum pump and the air is slowly removed. Because sound needs a physical medium to travel through.

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So sound cannot travel through vacuum because there is no matter for the vibrations to work in. Since a vacuum is void of any matter, sound cannot travel through it. However, sound waves are type of mechanical waves.

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The sound is a mechanical energy which can be produced only due to the vibration produced in the material body. Unlike electromagnetic waves, they require a medium to propagate. There are no particles in space. Sound, however, cannot travel through a vacuum: