The relativistic form of this effect was investigated using a type of Mössbauer spectroscopy by Pound and Rebka.
The relativistic form of this effect was investigated using a type of Mössbauer spectroscopy by Pound and Rebka. Although it is not time dilation, this effect was tested in the Mössbauer rotor and Ives-Stilwell experiment.  The transverse form of this effect involves the redshift or blueshift at the point of closest approach between a moving object and an observer. In the classical form of this effect, the velocity of the wave is divided by the sum of that velocity and the velocity of the source. For 10 points, name this effect in which the frequency of waves from a moving source changes, exemplified by an ambulance siren.
The relativistic form of this effect was investigated using a type of Mössbauer spectroscopy by Pound and Rebka.
Doppler effect [or Doppler shift; accept gravitational redshift before mention]