The Doppler
effect for a moving source and a stationary
observer. In the time the original wave has moved
a wavelength (which is 1 /
f0), the source has moved the
distance closer to the
observer, determined by the velocity V of
the source. The next wave will then meet the
observer after the distance - , corresponding to
the perceived wavelength . |
The Doppler effect for a stationary wave source and a moving observer. In the time the wave has moved the distance , the observer has moved the distance closer to the source, determined by the velocity v of the observer, and will meet the wavefront earlier , corresponding to the perceived wavelength , which is - . |