- Red-Shift or a shift of frequency to a lower wavelength (away from the observer)
- Blue-Shift or a shift of frequency to a higher wavelength (toward the observer)
This is the equation for Doppler shift
=velocity of observer
Velocity of sound in air = 330 ms-1.
Given: True frequency, f = 500 Hz,
Velocity of sound, vs = 54 km/hr = 54×1000/3600 = 15 ms-1,
Velocity of listener,v0 = 15 ms-1
Source and observer moving towards each other
Stay tuned with BYJU’S for more such interesting articles.