NEET 2003 Physics question
An observer moves towards a stationary source of sound with a speed of the speed of sound. The wavelength and frequency of the source emitted are and respectively. The apparent frequency and wavelength recorded by the observer are respectively :
Answer: (2)
Solution
The source is stationary, so the wavelength of the sound in the medium is unchanged: . The observer moving towards the source meets more wavefronts per second: \frac${v +
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