FTP name this effect that results in the frequency of a wave of light or sound appearing to be higher if the source is moving toward the observer and lower if the source is moving away.
This effect alters Breit-Wigner resonance at high temperatures, and the random motion of the atoms in a gas leads to this effect's namesake broadening of spectral lines. Accelerated excited hydrogen ions were used in the Ives- Stillwell experiment to measure the second order, or transverse, type of it. In astronomy, an application of the relativistic form of this effect is the redshift observed from distant galaxies. FTP name this effect that results in the frequency of a wave of light or sound appearing to be higher if the source is moving toward the observer and lower if the source is moving away.
This effect alters Breit-Wigner resonance at high temperatures, and the random motion of the atoms in a gas leads to this effect's namesake broadening of spectral lines.
{Doppler} effect or shift