The wavelength is 600 cm when the source is stationary. If the source is moving with relative velocity of 60 m/sec towards the observer, then the wavelength of the sound wave reaching to the observer will be (velocity of sound = 330 m/s)
98 cm
60 cm
49 cm
120 cm
As we learnt in
Frequency of sound when observer is stationary and source is moving towards observer -
- wherein
speed of sound
speed of source
original frequency
apparent frequency
Option 1)
98 cm
This option is incorrect.
Option 2)
60 cm
This option is incorrect.
Option 3)
49 cm
This option is correct.
Option 4)
120 cm
This option is incorrect.