One type of this phenomenon is specific to special relativity and is the most direct form of time dilation.
One type of this phenomenon is specific to special relativity and is the most direct form of time dilation. That type of this phenomenon was separated from the longitudinal type in the Ives-Stilwell experiment. Edwin Hubble used it to determine that the universe was expanding. This phenomenon can be used in astronomy to calculate the speed of receding galaxies by observing the (*) redshift of spectral lines. A common example of it is the change in pitch of the siren of a passing ambulance. For 10 points, identify this effect in which the frequency of a wave is changed when an observer is moving relative to its source.
One type of this phenomenon is specific to special relativity and is the most direct form of time dilation.
{Doppler effect} [or {Doppler shift}]