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प्रश्न
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
विकल्प
speed
frequency
wavelength
none of these
MCQ
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उत्तर
none of these
Hint:
If there is the same medium of a reflected obstacle is used, there is no change in speed, frequency, and wavelength of the sound.
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