STUCK The Chronicles of David Rea - 2011 The Observer Effect 1-1 was released on:

USA: 25 March 2012

Observer Effect was created on 2005-01-21.

Frequency change when 1)Source moves toward the observer 2)Source moves away from the observer 3)Observer moves toward sourse 4)Observer move away from the sourse, otherthan these observer and sourse moving away or towards each other.

This is due to the Doppler effect.

Doppler's effect does not happen when the observer is moving towards the source because unlike the source when observer moves forward the waves are not compressed and they pass the observer without being compressed and since the doppler effect is due to the Change in wavelength of the wave, it fails to occur.