Doppler

[ dop-ler ]

noun

1. Christian Johann, 1803–53, Austrian physicist: discovered the Doppler effect.

Doppler

/ dŏp′lər /

1. Austrian physicist and astronomer who in 1842 explained the effect, now named for him, of variations in the frequency of waves as a result of the relative motion of the wave source with respect to the observer.

Example Sentences

On each orbit, the planets pull the star slightly, which can be detected by the Doppler effect.

From The Daily Beast

Also new this year, in the wake of Sandy, NOAA will receive real time Doppler radar data from its “Hurricane Hunter” planes.

From The Daily Beast

The idea, initiated by Christian Doppler at Prague in 1842, was originally applied to sound.

From Project Gutenberg

The method of detecting binary stars by means of the spectroscope is an application of Doppler's principle.

From Project Gutenberg

The principle that the refrangibility of light is altered by end-on motion was enunciated by Christian Doppler of Prague in 1842.

From Project Gutenberg

Angle, strength and Doppler movement were computed to find course and distance.

From Project Gutenberg

Spectroscopic determinations of the velocities, through the Doppler-principle, are generally expressed in km.

From Project Gutenberg