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What affects the amount of red shift seen in the light from a galaxy?
Wiki User
∙ 11y ago
We can't be sure. The only thing we know for sure is that it could be explained as
the speed with which that galaxy is receding from us. If that's actually the cause
of the red shift, then from all the red shifts that we observe, we have to conclude
that all of the distant galaxies are receding from us, and the farther away one is
already, the faster it's receding. If all of that is true, then the whole universe is
expanding. This is the research that made Hubble famous.
Wiki User
∙ 11y ago
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What is red-shift and what does the size of the redshift tell us about the distant galaxies?
Red shift is the apparent elongation of the wavelength of light reaching us from distant sources of light due to the expansion of space in between. The amount of red shift can be used to work out the recessional velocity of a galaxy and it's distance from us.
What is an increase in the wavelength of light as a galaxy moves away from earth?
Red Shift
Interstellar reddening is caused by what?
A downward shift in frequency of radiation (perceived as reddening in the visible spectrum) is observed in most stars outside the Milky Way Galaxy. This red shift is assumed to be caused by the stars moving away from our galaxy at a sizable fraction of the speed of light. This shift is similar to the Doppler effect in sound.
Does the speed of light allow the Andromeda Galaxy to emit a blue shift?
There is some blueshift in the Andromeda galaxy as it is moving toward us. The speed of the Andromeda Galaxy relative to the sun is about 300 kilometers per second or about 0.1% the speed of light. The blueshift would be detectable by instruments but not to the human eye.
What is the importance of the light red shift in determining the age and motion of stars?
Red shift is of virtually no importance in determining the age of stars within our galaxy or local group. But the red shift is crucial for measuring relative velocities of those stars with respect to us. Stars approaching us are blue shifted, such as the stars in the Andromeda Galaxy. We can also determine which direction the galaxy is spinning, as the light of stars one one side will be shifted less than the light of the stars in front, or on the other side. Starlight from galaxies well beyond our local group are uniformly shifted towards the infrared end of the visible spectrum, varying with the distance of those galaxies from us. The further away they are, the deeper red the light is from them, indicating the greater their recessional velocity. I cannot think how stellar age might correlate with red shift.
What is the shift in the light of a galaxy toward the red wavelength called?
This phenomenon is called red shift.
What is red-shift and what does the size of the redshift tell us about the distant galaxies?
Red shift is the apparent elongation of the wavelength of light reaching us from distant sources of light due to the expansion of space in between. The amount of red shift can be used to work out the recessional velocity of a galaxy and it's distance from us.
What is an increase in the wavelength of light as a galaxy moves away from earth?
Red Shift
Why is light from the Andromeda galaxy is affectedly blueshift?
because when the blue shift hits the red shift they complete a reround in the galxey
What property of the light of a far away galaxy has changed to allow it to have a blue shift?
it Will not be a star
Is the big bang theory supported by the blue violet shift?
Outside of our Local Group, no galaxy gives off light that exhibits a blue-shift. You most likely meant to say "red shift."
Interstellar reddening is caused by what?
A downward shift in frequency of radiation (perceived as reddening in the visible spectrum) is observed in most stars outside the Milky Way Galaxy. This red shift is assumed to be caused by the stars moving away from our galaxy at a sizable fraction of the speed of light. This shift is similar to the Doppler effect in sound.
Does the speed of light allow the Andromeda Galaxy to emit a blue shift?
There is some blueshift in the Andromeda galaxy as it is moving toward us. The speed of the Andromeda Galaxy relative to the sun is about 300 kilometers per second or about 0.1% the speed of light. The blueshift would be detectable by instruments but not to the human eye.
Does the colour of a galaxy reflect its distance away from the earth?
No, however, we can determine whether a galaxy is moving towards or away from us, by looking at the shift in its spectrographic analysis. There are "red shifts" and "blue shifts" in spectrographic results. "Blue shifts" indicate that a galaxy is moving towards us, because the wavelength of the light emitted by the galaxy is compressed, causing it to shift to the blue end of the colour spectrum. "Red shifts" indicate that a galaxy is moving away from us, because the wavelength of the light emitted by the galaxy is being stretched towards the red end of the colour spectrum.
What is the red shift and how is it important to your understanding of the universe?
Red shift is the irrefutable fact that the light from all distant galaxies (ie, those outside our Local Cluster) has a longer wavelength (ie, is shifted to the red spectrum) than it would if the galaxy were close to us. It is also irrefutable that the amount of red-shift is dependent on the distance between us and the galaxy. In conjunction with other irrefutable facts, the only explanation is that the distances between all galaxies -- indeed, all lengths -- are growing greater with time.
If an astronomer is observing a galaxy and notices red shift what do we know about the galaxy?
That means the galaxy is moving away from us.
How is wavelength of the light waves received is affected by the movemenet of a galaxy?
The wavelengths of light waves would go through either a blue shift or a redshift depending on whether the galaxy is moving toward the receiver or away. A redshift occurs when the light source, a galaxy, is moving away from the receiver. The light will shift towards the red end of the spectrum. If the galaxy is moving towards the receiver, the light will shift towards the blue end of the spectrum. This effect is caused by the Doppler effect because the wavelengths are either being squished together or stretched apart due to velocity. It effects other waves as well but the moving towards red or blue can't be applied to those. Read http://en.wikipedia.org/wiki/Redshift for the other wavelengths. That and my junior year's physics class was my source.
