how sound needs medium to travel ?prove it with an activity.
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Take a clock and glass jar and apply timer go 2 or 3 minute later and close it tightly and release complete air by vaccum pump and after 2 min. We see alarm clock ring but we can't hear the sound so........... This is activity.
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Sound needs a medium to travel, of course.
It can be explained by the activity:
Take a bench and tap it by keeping your ear at it u do hear the sound as it has the molecules or particles which allows the sound to travel.
But when there goes on the fission reaction in the sun there is a lot of sound created but u cannot hear it as there is a vaccum between the earth and the sun called space/cosmos.
Vaccum means an area no particles so there is no propagation of sound.
It can be explained by the activity:
Take a bench and tap it by keeping your ear at it u do hear the sound as it has the molecules or particles which allows the sound to travel.
But when there goes on the fission reaction in the sun there is a lot of sound created but u cannot hear it as there is a vaccum between the earth and the sun called space/cosmos.
Vaccum means an area no particles so there is no propagation of sound.
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