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It is the effect that happens when waves like sound are moving in relation to another object. In the classic train whistle example, The whistle suddenly drops in pitch as it passes you and starts to move away from you. This is because the sound waves now are stretched out, giving them a lower pitch. It is useful. Doppler radar used in weather forecasting is one example.

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Q: What is the Doppler effect and is it useful?
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Related questions

How is the doopler effect used?

The Doppler effect is useful for and used for detecting objects velocity. The Doppler radar tells whether the object is heading toward or away from you or perpendicular to you.


What is the change in frequency of a sound due to motion of the source?

The change in frequency is caused by the Doppler Effect


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What did Christian Doppler do?

He discoverd the Doppler effect


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Who discovered the Doppler effect?

Christian Doppler did not invent Doppler Radar. He described what is now known as the Doppler effect in 1842 in Austria. It is used to describe the behavior of waves (such as light or sound) that are emitted by a moving object. Doppler radar, which utilizes the Doppler effect, was developed in the United States during World War II.


What does the Doppler Effect provide evidence for?

The Doppler effect proves that sound travels in waves.


How can you use Doppler effect in a sentence?

Example sentence - We are learning to what the doppler effect is and how to use it.


What exactly is the Doppler effect?

The Doppler effect is the change in frequency of a sound wave. The Doppler effect causes a siren or engine to have a higher pitch when it is approaching than it does when it is receding.


What is an explanation of the Doppler shift?

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The changing pitch of a police cars siren as it moves by you is an example of what?

The Doppler effect