A student does an activity where he puts a ringing phone in the glass tumbler. The student covers the glass tumbler with his hand and removes air from the glass tumbler by sucking it out. Now he observes that the sound of the phone faints gradually. What can be concluded from the observation?
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Answer:
because air is medium of sound and in this experiment the air was removed from glass tumbler that's why sound of phone is fainted
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It can be concluded from the observation that sound needs a medium to travel.
- We must note that sound needs a medium to propagate which means that the molecules of the medium help the sound to travel from one point to the other.
- Since there are no molecules in vacuum, thus when the student sucks out all the air from the tumbler, the sound is unable to propagate and gets fainter gradually.
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