0
How is red shift used to determine the speed of movement of the star?
Wiki User
∙ 15y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
The red shift of visible light waves that is observed by astronomers on earth is used to determine the?
The speed of relative retreat of the star.
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.
What is paralax?
An apparent change in position of a star due to the movement of the Earth in it's orbit. The closer the star is there is a larger shift and the further the star is there is a smaller shift.
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.
How does the speed of the star affect the spectrum?
As a star moves away from us it has a red color shift.
What can you infer about a star that exhibits a red shift in its spectra?
It is moving away at a significant speed.
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
What type of shift in the spectrum would you expect from a star that was moving in the same direction as earth and at the same speed as earth?
No shift under those conditions.
What method is used to determine a star's speed of approach?
The Doppler effect - a change in frequency, dependent on relative speed.
What is an area that's not currently being studied?
Hubble's red shift is due to movement, however, a large mass (star) will gravitationally cause a red shift. The former is studied; the latter is not.
Does the velocity of a star toward or away from earth determine measuring the shift of its spectral lines?
Yes. If the star is moving away from the Earth, its spectral lines will shift towards the red end of the spectrum. If it is moving towards the Earth, its spectral lines will shift towards the violet end of the spectrum. This is due to Doppler effect.
Observation of the shift of a stars spectrum toward the red or blue enables us to determine the stars?
The star's velocity (away from us, or towards us).
