A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1). The apparnet change in the wavelength of sound heard by the observer is (speed of sound in air =340 ms^(-1))

A source producing sound of frequency 170 Hz is approaching a stationa

1.	A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1). The apparnet change in the wavelength of sound heard by the observer is (speed of sound in air =340 ms^(-1))
Answer» `0.2 m` `0.1 m` `0.5 m` `0.4 m` SOLUTION :`lambda=(v)/(N)=(340)/(170)=2M` `n'=(340)/(340-17)xx170` `n=178.9 Hz` Now, `lambda'= (v)/(n)=(340)/(178.9)=1.9` `RARR lambda- lambda'=2-1.9=0.1 m`