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How does the Doppler effect indicate a stars movement toward away from earth?
Wiki User
∙ 8y ago
The "red shift" (or frequency decrease) indicates that an object is moving away from you. It works just like a radar speed trap.
When applied to stars it shows that some are moving away and others are getting closer. BUT when applied to galaxies ALL (except for a few close neighbors) are moving away ... and the farther away they are, the faster they're going.
Wiki User
∙ 11y ago
Wiki User
∙ 8y agoThe redshift deals with what is known as the Doppler effect. When an object moves toward you, the wavelengths of light reflected or emitted by it become shorter, resulting in a blueshift. If the object is moving away from you the wavelength of light becomes longer, resulting in a redshift. Observations of the universe show that almost every galaxy is redshifted and therefore moving away from us. The farther the galaxy is the faster it moves. The only conclusion can be that the universe is expanding.
Wiki User
∙ 8y agoThe frequency changes when an object - such as a star - moves away from us, or towards us. If the object moves away from us, the frequency (as observed by us) decreases. If it moves towards us, the frequency increases.
Wiki User
∙ 12y agoDoppler shift is towards red hence named as red shift. This indicates that the galaxies move away from one another. So expanding universe is predicted. Hence big bang theory!
Wiki User
∙ 11y agoIt show dat da sound wen it move away it make les noyse dat u nowe it away
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Why doesn't the Doppler shift appear when an observer moves toward the source?
Doppler's effect does not happen when the observer is moving towards the source because unlike the source when observer moves forward the waves are not compressed and they pass the observer without being compressed and since the doppler effect is due to the Change in wavelength of the wave, it fails to occur.
What is the name of the effect that describes how the pitch of a sound seems higher as it gets closer and lower as it gets farther away?
This is called the Doppler effect. Because air is compressible, that causes sound waves to lengthen the further you get from the source. This is also how radar speed detection works. The device calculates the rate of the Doppler shift to determine the speed of the car or other object being measured.
What is the evidence of motion of the universe?
The most important piece of evidence that shows that the universe is in motion is the Doppler Effect, also termed the red shift. This basically means that objects headed away the observer will have their light bent toward the "red" (lower frequency) side of the light spectrum while objects headed toward the observer will have their light bent toward the "blue" (higher frequency) end of the spectrum. By using the Doppler Effect we are able to that the majority of the universe is in motion, expanding outward.
What is Doppler?
Doppler |ˈdäplər|Doppler, Johann Christian (1803-53), Austrian physicist. In 1842, he discovered what is now known as the Doppler effect. Doppler effectnoun Physicsan 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.
What causes a redshift in light from stars?
No. The Doppler shift tells us if the object is moving toward us or away, and how fast. But it says nothing at all about whether, or how fast, the object is moving to the side. Doppler tells us about the part of the velocity that is TOWARD or AWAY. It says nothing about its velocity left, right, up or down.
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.
The apparent shift in the spectrum of a star as it moves toward or away from the earth is explained by the phenomenon known as the?
Doppler effect. This effect causes the wavelengths of light from a star to appear shorter (blueshifted) as it moves towards the Earth and longer (redshifted) as it moves away, providing valuable information about the star's motion in space.
Does the Doppler effect only apply to sound waves?
No
Is the Doppler effect the actual change in a stars frequency of a wave?
No. Doppler effect measures relative speed toward or away from the observer, there is no effect on the star itself.
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.
How does a beluga whale determine whether a fish is moving away from it or toward it?
By using the Doppler effect
Will the listener notice the Doppler effect if he or she and the source of the sound are traveling toward each other?
yes
Will a listener notice the Doppler effect if he or she and the source of the sound are traveling toward each other?
Answer:Frequency - for nova net
Which refers to the change in wavelength tht occurs when an object moves toward or away from a source?
doppler effect
How can astronomers determine whether a star is moving toward or a way from earth?
They can do so by examining the light from the star. Doppler shift can indicate this
The change in wave frequency of energy as it moves toward or away from an observer is the?
The Doppler effect. Good luck with your homework.
Using the Doppler effect astronomers can determine a stars what?
How close and far something is from you.
