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What happens when a star's spectrum is redshifted as a result of the Doppler effect?
Wiki User
∙ 12y ago
With respect to light, the Doppler effect refers to the apparent change in the frequency (and wavelength) of electromagnetic radiation due to the relative motion of the source relative to the observer.
When the source (i.e. a star) moves AWAY from the observer, there is an apparent rarefaction (expansion) in the wavelength of emitted light (i.e. frequency decreases), causing a shift in the emission spectrum towards the red side. This is known as redshifting --> the star is moving away from the observer.
The opposite happens in blueshift, when the source moves towards the observer.
Wiki User
∙ 12y ago
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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.
The blank effect allows us to use the spectrum to study a source's motion?
The Doppler affect
Doppler effect states that the motion of any object can?
Shift the wavelength of the spectrum.
What is the for the change in star's spectrum when it moves away from earth?
There is a change in frequency; this effect is called "Doppler effect".
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
If a star is moving away from you the absorption lines in its spectrum will?
If a star is moving away from you, the emission lines in its spectrum will be shiftedtoward longer wavelengths/lower frequency/the red end of the spectrum, since theyoriginate on the star itself.But there's no effect on the absorption lines, because those are caused by materialthat's unrelated to the star, and just happens to be in the line of sight between thestar and you.
What is a redshifted light called?
You may want to refine the question. Red shift is the systematic shift of spectral lines from very distant cosmic sources toward the red end of the spectrum. It seems to derive primarily from the Doppler effect, so one might say that it is Dopplered toward the red. I can think of no other specific name for it, so am not certain what you are asking.
Is true of the Doppler effect?
the Doppler effect involves moving objectsthe Doppler effect involves moving objects
What has the electromagnetic spectrum got to do with the Doppler Effect?
The Doppler effect affects any wave, including electromagnetic waves. Basically, the idea of the Doppler effect is that the frequency of a wave increases when an object approaches you, and it decreases when it moves away from you. You can imagine that the sound waves, or electromagnetic waves, become compressed when the emitting object moves toward you.
What happens to a sound source as it approaches?
It appears to have a higher frequency due to the Doppler Effect.
How does redshift support the notion of the expanding universe?
The redshift of distant galaxies is believed to be a result of the Doppler effect - in other words, the light is shifted towards lower frequencies ("redshifted") due to the fact that the galaxies move away from us.
How can a stars spectrum be different from another stars spectrum?
The differences in spectrum are mainly due to: * Differences in temperature between the stars * Differences in chemical composition * Differences in relative movement (redshift / blueshift, due to the Doppler effect)
