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The Doppler effect tells us that the frequency of a wave changes when the source of the wave or the observer is in motion relative to one another. This change in frequency results in a shift in the perceived pitch of sound waves or the perceived color of light waves.

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1y ago

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What can the Doppler effect tell us about in astronomy?

It can tell us whether a star, or a galaxy, is moving towards us or away from us.


What does the Doppler Effect tell astronomers about the universe?

It tells us that the Universe is expanding.


What does the Doppler affect tell astronomers about a star?

The star attracts the planet; the planet attracts the star. As a result of the latter, the star changes position. If this change is such that the star moves away from us during one part of the planet's orbit, and towards us at another (or more generally, the star's speed towards us, or away from us, changes slightly), then this can be detected as a Doppler shift.


Which term describes an apparent change in frequency of sound waves of rapidly moving objects?

Doppler effect


The blank effect allows us to use the spectrum to study a source's motion?

The Doppler effect allows us to use the spectrum to study a source's motion. This effect causes a shift in the wavelengths of light emitted by a moving source, which can be detected and used to determine the direction and speed of the source's motion relative to the observer.


How can you tell that some galaxies are far away and moving rapidly towards us?

You can tell by the blueshift in the spectrum; the only reasonable explanation for this blueshift is the Doppler effect. - Please note that most galaxies are moving away from us, not towards us.


How does it affect to animals?

First, tell us what it is.


How many Doppler radars are in the US?

There are 155 Doppler radars across the US and around 122 local offices.


Where was the first Doppler radar used in the US?

The exact location of where the first Doppler radar system was used cannot be determined because the first radar systems were mobile.


Does a star that shows no Doppler shift move?

If there is no observable Doppler shift, then the star is probably not moving very fast. This refers to the component of the star's movement toward us, or away from us - the "sideways" part of the movement can't be determined by the Doppler effect.


Do you use the Doppler effect or particle accelerators to measure the speed of stars?

The Doppler effect is used to detect whether a star is moving away from us or towards us. This method doesn't tell us anything about a star's "sideways" movement. OR The Doppler Effect should be corrected for the (gravitational) size of the star, since gravity also changes the light's energy. re: Sideways movement, I thought special relativity reacts to sideways motions? Besides, how long can a star be traveling sideways -- technically, no distance.


What is the name of of the ultrasonic documentation that records velocity mapping and imaging?

Doppler echocardiography Doppler echocardiography Doppler echocardiography Doppler echocardiography