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

Their Earthcare satellite used a Doppler radar to capture the view.

From BBC

It also carries the first space-based Doppler radar to track the motions of clouds and probe how they fuel storms.

From Science Magazine

Operating in an era before Doppler radar and high-speed super computers, Allied meteorologists had to rely on hand-drawn maps, historical data, and spotty weather observations to put together their forecasts.

From Seattle Times

The wearable ultrasound patch marks a significant leap from the current clinical standard, called transcranial Doppler ultrasound.

From Science Daily

Due to the Doppler effect, a fire truck's siren gets higher-pitched as it travels closer and sounds lower-pitched as it drives farther away.

From Science Daily