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Q.

Is it true that sound waves need a medium for their propagation?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A mechanical wave is a type of wave motion in which medium particles oscillate and transfer energy throughout the medium. Mechanical waves require a material medium to propagate and will stop propagating if one is not present, such as a solid, liquid, or gas. Because sound waves are an example of mechanical waves, they require a medium to propagate.
 
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