Hippolyte Fizeau discovered this effect independently from its namesake in 1848. In spectral lines, this effect causes a namesake "broadening." In astronomy, it can be used to calculate radial velocities of neighboring galaxies. When two astronomical objects are moving away from each other, this effect produces red shift. Its applications include sonar and radar. For 10 po
Hippolyte Fizeau discovered this effect independently from its namesake in 1848. In spectral lines, this effect causes a namesake "broadening." In astronomy, it can be used to calculate radial velocities of neighboring galaxies. When two astronomical objects are moving away from each other, this effect produces red shift. Its applications include sonar and radar. For 10 points, name this effect in which the apparent frequency of a wave changes with the relative velocity of the observer to the source.
Hippolyte Fizeau discovered this effect independently from its namesake in 1848.
{Doppler} effect [or {Doppler} shift; do not accept "{red shift}" or "{blue shift}"]