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Doppler - Meaning, Definition & English Examples

Doppler refers to the change in frequency or pitch of a wave, such as sound or light, when the source and observer are moving relative to each other. It is commonly observed with sirens or radar.

doppler

/ˈdɑplɚ/ /ˈdɒplə/

Definition:

The change in frequency of waves due to relative motion between source and observer.

Synonyms:

shift, effect, phenomenon

Part of Speech:

noun

Antonyms:

static, unchanging

Common Collocations:

Doppler radar, Doppler ultrasound, Doppler shift

Derivatives:

Dopplerian, Doppler-like

Usage Tips:

Use "Doppler" to describe frequency changes in waves caused by motion, especially in physics or medical contexts.

Common Phrases:

Doppler effect, Doppler shift, Doppler broadening

Etymology:

Named after Austrian physicist Christian Doppler, who described the phenomenon in 1842.

Examples:

  • 1. The Doppler effect explains why a siren's pitch changes as it passes by.
  • 2. Doppler radar helps meteorologists track storms and predict weather patterns accurately.
  • 3. Astronomers use the Doppler shift to measure the speed of distant galaxies.
  • 4. A Doppler ultrasound can detect blood flow issues in the body non-invasively.

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