Definition of Doppler effect in English:

Doppler effect

nounˈdɒplərɪfɛktˈdɑplər əˌfɛkt

Physics

An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the red shift seen by astronomers.
Example sentencesExamples
- This determination assumes the variation of the redshift is indeed a Doppler effect due to motion of the star.
- There is a familiar analogous phenomenon for sound known as the Doppler effect, which explains, for instance, why the pitch of an oncoming train changes as the train approaches and then recedes from us.
- In the astronomical setting, the Doppler effect applies to light.
- Basically the Doppler effect is that pitch increases the closer something gets to you, and it decreases the further away it gets.
- The normal Doppler effect causes sound waves to get longer if the source of the sound is moving away - for example, a receding ambulance siren.

Definition of Doppler effect in US English:

Doppler effect

nounˈdɑplər əˌfɛkt

Physics

An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the redshift seen by astronomers.
Example sentencesExamples
- There is a familiar analogous phenomenon for sound known as the Doppler effect, which explains, for instance, why the pitch of an oncoming train changes as the train approaches and then recedes from us.
- The normal Doppler effect causes sound waves to get longer if the source of the sound is moving away - for example, a receding ambulance siren.
- In the astronomical setting, the Doppler effect applies to light.
- This determination assumes the variation of the redshift is indeed a Doppler effect due to motion of the star.
- Basically the Doppler effect is that pitch increases the closer something gets to you, and it decreases the further away it gets.

单词	Doppler effect
释义	Definition of Doppler effect in English: Doppler effect nounˈdɒplərɪfɛktˈdɑplər əˌfɛkt Physics An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the red shift seen by astronomers. Example sentencesExamples This determination assumes the variation of the redshift is indeed a Doppler effect due to motion of the star. There is a familiar analogous phenomenon for sound known as the Doppler effect, which explains, for instance, why the pitch of an oncoming train changes as the train approaches and then recedes from us. In the astronomical setting, the Doppler effect applies to light. Basically the Doppler effect is that pitch increases the closer something gets to you, and it decreases the further away it gets. The normal Doppler effect causes sound waves to get longer if the source of the sound is moving away - for example, a receding ambulance siren. Definition of Doppler effect in US English: Doppler effect nounˈdɑplər əˌfɛkt Physics An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the redshift seen by astronomers. Example sentencesExamples There is a familiar analogous phenomenon for sound known as the Doppler effect, which explains, for instance, why the pitch of an oncoming train changes as the train approaches and then recedes from us. The normal Doppler effect causes sound waves to get longer if the source of the sound is moving away - for example, a receding ambulance siren. In the astronomical setting, the Doppler effect applies to light. This determination assumes the variation of the redshift is indeed a Doppler effect due to motion of the star. Basically the Doppler effect is that pitch increases the closer something gets to you, and it decreases the further away it gets.
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