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Q.

Is it true that when a sound travels from one medium to another its frequency changes?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
The most important property of sound is that at constant temperature and humidity, the speed of sound remains constant in a medium of propagation. So only the wavelength will change, and the frequency will remain the same. The frequency of a sound depends upon the nature of the source of sound and not on the propagation medium. Therefore, the sound frequency will remain the same when sound travels from one medium to another.
The correct statement would be that when a sound wave travels from one medium to another, its frequency does not change.
 
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