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Question

Mention two properties of a wave; the property which varies and the other which remains constant when a wave passes from one medium to another.


  1. Property which varies: Speed (or velocity) and Wavelength
    Property which remains constant: frequency

  2. Property which varies: Speed (or velocity) and frequency
    Property which remains constant: Wavelength

  3. Property which varies: Wavelength
    Property which remains constant: Speed or velocity and frequency

  4. Property which varies: Wavelength and frequency
    Property which remains constant: Speed or velocity


Solution

The correct option is A

Property which varies: Speed (or velocity) and Wavelength
Property which remains constant: frequency


v = f * λ. Now, v and λ vary when a wave moves from one media to another. But frequency remains constant as it is the characteristic of the source which produces the sound. 

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