Doppler

American  

[dop-ler] / ˈdɒp lər /

noun

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

---

Doppler Scientific  

/ 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

“At 8:53 a.m. Doppler radar indicated thunderstorms producing heavy rain across the warned area,” an alert warned.

From Los Angeles Times • Dec. 25, 2025

Lines in the spectrum regularly shifted back and forth, suggesting the star was being tugged by an orbiting companion, Doppler shifting the light.

From Science Magazine • Dec. 3, 2024

Or when they include plans to destroy the very Doppler radars that scientists need to track these storms—because people think that that equipment is controlling the weather, not just detecting it.

From Slate • Oct. 11, 2024

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

From BBC • Jun. 27, 2024

The most obvious explanation of the red shift was in terms of the Doppler effect: the galaxies were receding from us; the more distant the galaxy the greater its speed of recession.

From "Cosmos" by Carl Sagan