Unanswered | Answered

Red Shift

Parent Category: Cosmology
When the galaxies or other celestial bodies are moving away, the light waves become stretched out, that is, they become redder. This process is called red shift.
The location of those lines would be shifted to a longer wavelength (or lower frequency or energy) -- ie, towards the red part of the visible spectrum. In other words, a red shift.
The Big Bang theory predicts an expanding universe. The red shift, being the Doppler effect of light when something is receding from you, confirms this because when looking at galaxies the light emitted from them is red shifted. The farther away galaxies have a higher red shift, confirming that all...
Cosmological redshift is the shift in stellar spectrum due the space within our Universe expanding since the time of the Big Bang. It is isotropic, which could only happen if the Universe were expanding -- if it was spinning apart, the red shift would be different in different directions.The age of...
Redshift measure the recession speed of stars and galaxies. These speeds are proportional to distance--the farther a star or galaxy is from a given location in space, the faster that entity is moving away from that location. This proportionality is given as Hubble's Law. In general, everything is...
Redshift or blueshift is a change in the frequency of the light you  receive, compared to the frequency at which it was emitted. A  redshift is a reduction in frequency; this basically means that the  object that emits the light is moving away from you.
"Redshift", which means that the frequency of the light as seen by  us is LESS than the frequency at which it was emitted, tells us  that an object is moving away from us.
Edwin Hubble didn't discover redshift. What he did was make a  systematic statistic of redshifts and blueshifts, of known  galaxies. What this demonstrated was that the Universe is  expanding.
Whenever there is a relative motion between a source of light and  observer then frequency appears to get changed. So colour would be  changed. If both recede away from one another then there will be a  apparent decrease in frequency and so colour has to move towards  red end of visible spectrum...
Most galaxies are moving away from us. Only a few galaxies, which  are nearby, are moving towards us.
The universe is expanding, as a result both of the Big Bang (some thirteen and a half billion years ago) and also what appears to be pressure exerted by what is known as dark energy (which is to say, some kind of energy which we have a great deal of difficulty in directly observing). Because of this...
The star is moving away from us. Therefore, the Doppler effect must be considered. The Doppler effect is waves (in this case light) will be compressed in front of a moving object and stretched behind the object. This stretching creates a long wavelength. Red light has a long wavelength (the...
The expansion of space in all parts of our Universe.When a group of photons leave an object (like a super-nova in a distant galaxy), they have a certain wavelength, and a certain distance between the first photons from that super-nova and the last such photons.During their travel, the expansion of...
It is a change in the wavelength of light (or other electromagnetic radiation)emitted by a source. A redshift means the wavelength is increased and a blueshift is when the wavelength shortens. (Red light has a longer wavelength than blue light.) The 3 causes of these effects are: 1) The Doppler...
That can be either a result of the Doppler effect, or a  cosmological redshift. The latter is caused by an expansion of  "space itself".
Both can be observed. However, redshift is observed for most  galaxies, because of their distance (and the general expansion of  the Universe).
Cosmic redshift is a cosmological phenominon created when a distant object in our universe is speeding away. This is seen because the Universe is expanding. As the object races away the light waves stretch, making them longer in the spectrum, and the longest wavelength is red. This effect can be...
It tells us that most galaxies are moving away from us.
Let's begin by analogy with sound waves. You may have stood by a railroad crossing while an approaching train was sounding its horn. As the horn passes you, you'll note that the pitch of the sound (= frequency of the sound wave) changes to a lower tone. What's happening is that, as the horn...
A red shift is when a object's light turns red because of the Doppler effect. The Doppler effect The Doppler Effect is when the light waves get longer or shorter because of distance. For Example: Most stars and galaxies are red shifted because they moving away from us. That's gives a red shift...
No, it's the other way round. The Big Bang is responsible for the  redshift.
It tells us that the Universe is expanding.
Redshift does not expand the universe. Redshift is a physical quantity that is used to describe the expansion of the universe. The current time has a redshift of zero. at redshift 1, the universe was half the size it is now. At redshift 2, the universe was 1/3 the size it is now, and so on. if...
The red shift does not expand the universe. The red shift is an indicator that the universe is NOT Expanding. The red shift is an indicator of the centrifugal ( outward) force needed to balance the centripetal ( inward) force of gravity or electrical attraction. The earth has a redshift v/c= 30k...
The useful energy will be gone eventually, one way or another. As a  result of the Second Law of Thermodynamics, it is unavoidable that  we will eventually run out of useful energy.
Redshift, since the Universe is expanding. Only in the case of  objects that are relatively nearby will the "proper motion"  sometimes dominate, so that some objects actually move towards us.
On short distances (ie. within a few million lightyears), the redshift we see is the direct result of the Doppler effect. The Doppler effect causes light from receding sources to be less energetic, and thus red-shifted. On distances exceeding that, redshift can be attributed to the metric expansion...
It is the color of the light shift. either red or blue, from an object, not the object itself, that determines if it is moving away( RED) from us or moving toward us (BLUE).
Objects emit light in different wavelengths which we perceive in  varying colors (and also those we can't see, such as  ultraviolet, x-rays, gamma rays, etc.) With that in mind, think of  redshift as a movement away from you, as indicated by the  distance between the waves of light (emitted from...
If you are using paint then you would just get a big blob of red paint. Or if you are using pencil crayons then it would just look like red. It would look like a solid colour. Or if you are using crayons, then it would be the same thing, and so it would be for the chalk. If you are using it. Either...
The red shift "proves" that the galaxies are attracted by a central force and are in Continuity Condition. The larger the red shift, the larger the central attraction. The red shift is the cosine of the angle between the velocity and the radius cos(VR). The cosine is max when the the angle is...
Its part of science! Edit : In astronomy, the Doppler effect is the change in wavelength of light caused by movement of a light source such as a star or a whole galaxy. The term "red shift" refers to the increase in the light's wavelength from the blue to the red end of the spectrum. This happens...
No one, in the field of physics, says the conservation law does not apply to the universe as a whole. In fact the opposite is true, that entropy always increases. The speed of light in a vacuum is a universal constant and can neither increase or decrease.
All modern models based on science that are worth their salt would be. The only major theory I know about the origin of the universe is the Big Bang Theory, which is supported by Red Shift observations. Galaxies we can observe are all moving away (we know this due to Red Shift) from a central point...
Well red shift occurs when an object is moving away from you in a particular way, causing the frequency of light from it to move proportinally towards the red end of the visible spectrum. Therefore, redshift supports the 'expanding' model of the universe.
Redshift and blueshift refer to a change in frequency of light we  receive from distant objects (stars, galaxies, etc.) The light can  turn different colors, and purple is one of them. However, no  matter what the color the light changes to, the technical term is  always "redshift" if the...
Red shift is a phenomenon of the natural world; it was not created.
the universe is changing by red shift because when red shift occurs it means that galaxies and stars are moving away from us. this means that the whole universe must be expanding.
That the galaxy is moving away from us.
The red shift is a Doppler effect for visible light that implies an object is moving away from you. The blue shift is a Doppler effect for visible light that implies an object is moving towards you. Stars are distrbuted within galactic clusters. If a star is red-shifted, the distance between us and...
The Big Bang Theory implies that everything in our current Universe was contained as energy in a "Primordial Seed." that was smaller then an atom. Where this "seed" came from is not in the realm of science, as anyone can appreciate, and no one has been able to answer this without incurring the...
Light received by an observer is affected if the observer or the  source are moving towards or away from one another. This is the  Doppler Effect.   This is sort of like a race car.   As it's approaching you, its noise sounds higher in pitch, and  lower in pitch as it's moving away from you...
Both the Red and Blue shifts are qualities of the doppler effect. Expansion of the universe is demonstrated via the redshift of galactic clusters (outside of the local galactic cluster which hosts the Milky Way galaxy). Contraction (or attraction) of interlocal galactic clusters is demonstrated via...
ones moving away from us   Above is the typical Doppler Explanation. Of course, the star could  be even still relative to us, when you consider the gravity hole  (as an explanation for the red shift).
First of all, we don't see blue shifts, just red shifts, meaning an expanding, not contracting universe. Second of all, these red shifts come from stars in the universe, not planets in the world. What would happen if the red shifts disappeared? Well, there'd be a whole bunch of excited scientists,...
Telescopes, nicely cooled, and spectrometers.5 pounds of cheese 3 eggs and 14 grams of pure sweat from a fat Chinese man
The short answer to this question is "everywhere". Redshift is one aspect of the Doppler effect of light. An observer, looking at an object that emits light, will see the apparent wavelength of that light either compressed to shorter values (if the object is moving toward the observer) or stretched...
The basic idea is to extrapolate the movement of galaxies into the past: at a certain moment, they were very close together.
that is determine`s the distance some thing is away form us
A method for determining the distance stars uses a concept call red  shift where light from a star is more red due to its motion.
light is put into a spectrum from red to blue. red shift is when a star is moving away from us so fast that the light waves stretch moving it up the spectrum, so up towards infared
The opposite of the red shift is the purple shift.
Mainly that the Universe is expanding. Analyzing far-away galaxies, it has recently become clear that the expansion is accelerating - the Universe is now expanding faster than a few billion years ago.
Speaking generally, most objects in the universe are red-shifted, that is they appear to be moving away from us. There are exceptions to this, obviously. There are plenty of objects in our own galaxy that appear to moving towards us. Plus the Andromeda galaxy appears to be on a collision course with...
One can only describe an object as having a redshift or blueshift if it can be observed from the outside. Since the universe cannot be observed from the outside, one cannot say that the universe itself is redshifted or blueshifted. Many objects within the universe are redshifted or blue shifted...
you should probably ask your docter about that if ur having red shift
There is a light source far away that we can see. It emits a gamma ray but by the time it gets here, we see it as a microwave or something similar. This indicates that the space between the source and us has expanded, stretching out the original light wave. Ever heard of the Doppler effect?
Christian Doppler, and Austrian Physcist .
Red shift occurs when an object is moving away from us and blue shift is the opposite. This is important because it has been observed that most things in our universe are red shifted, and thus, moving away from us. In fact, it has been calculated that the way these objects are moving (th direction...
Red shift and blue shift refers to light becoming more reddish or more blueish. A useful analogy is the Doppler effect with sound. The sounds of an approaching police car has a higher pitch than normal, whilst if it is receding the pitch would be lower. Objects that make noise and are moving...
"Neither, it is contained within our own galaxy."That is not Correct,Sirius A has a local proper motion, BLUE SHIFT, expressed by an attributed velocity of about −7.6 km/s, originally thought in 1868 to be receding at 40 Km/s.Sirius A and B are Companion stars. They are only 8.6 light years away....
nice question! actually when a wave approaches an observer the wave length of the wave decrease and as it move far from us its wavelength increase. it is quiet difficult to understand so use your imagination. as the wavelenght increase the spectrum will be shifted toward red spectrum and thus called...
Red shift happens as the distance between an observer and an emitting body increases. Because of the velocity away from the observer, the wavelength increases, or shifts toward the red end of the spectrum.
Answer 1: -- "Red shift" means that the light you observe has longer wavelength than it had when it left the source. This is the case when a star or galaxy is receding from us. -- "Blue shift" means that the light you observe has shorter wavelength than it had when it left the source. This is the...
Red shift works when galaxies or other bodies are moving father away. the light is stretched, ie it becomes redder. Blue shift is opposite.
A red shift indicates that the object emitting the wave in a medium  is moving away from the observer. A red shift and blue shift are  both what is called the Doppler effect: the raising or lowering of  an wave's frequency because of motion. For example, imagine a  situation where an ambulance...
A 'red shift' is the increase in the wavelength of light received from astronomical objects, compared to what we know the wavelength should be. It's called "red shift" because if the wavelength of some visible light is increased, the color of the light changes in the direction of the color with...
The EM spectrum includes visible light. If an object moving very fast comes toward a reference point, the visible light radiating off it/reflecting off it gets "squashed": the wavelengths become shorter. This makes the visible light accquire a blue tinge. The opposite happens for an object heading...
Red shift is the change in the spectra of galaxies towards being more red than we would expect them to be.Doppler Shift results from galaxies being in motion away from us. Thus, the large Andromeda Galaxy has a blue shift, because it and our Milky Way Galaxy are being pulled towards each other due...
Less than you'd think. At extreme distances, the red-shift is caused by metric expansion more than by motion. So to be able to gauge the speed of an object relative to you, you'd first have to determine the pseudo-speed caused by metric expansion.
No one ever said that they do. In fact, the only way we know a distant object's [radial] speed is through its red shift. So if two objects have the same red shift, then as far as anybody knows, they have the same speed.
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...
Examine the light of hydrogen emissions from a distant galaxy.Compare that spectrum with that of hydrogen in a laboratory.You'll find that spectrum is identical EXCEPT that it is shifted towards longer wavelengths.
Redshift and blueshift are indicators of motion. A redshift means  that a star is moving away from us while a blueshift means it is  moving toward us.
If a galaxy is red-shifted, the distance us and that galaxy is increasing. If it is blue-shifted, the distance is decreasing.If the galaxies in our Universe were random in their velocities relative to us, about half of them would be red-shifted and about half would be blue-shifted; and the distance...
Shifting is this context refers to the Doppler shifting of emitted light. Objects moving towards us will undergo blueshift while light moving away will undergo red shifting. If a star previously known to have a blueshifted emission spectrum changes to red shiffted then the stars relative velocity to...
universe is expanding at an accelerated rate.
use your brain to answer it its ok for your answer.
The red shift is used to measure how fast the galaxies are moving away from us. The greater the red shift, the faster the galaxies are moving away from us.
Scientists can tell if an object is moving toward or away from earth using blueshift and redshift. The light waves reflecting off an object/radiating off an object will get "squashed" when the object comes toward earth, making the object look bluer. When moving away from earth, the light waves gt...
red shift is a distance and galaxies are planets. galaxies are also chocolate bars and red shift is not. thanks for your time. now go use your own knowledge and stop using google you gimps.
Two things can cause red-shift:- The rapid motion of an object away from the observer. This is known as the Doppler-effect.- Expansion of space between the object and the observer.
The use of red shift measurements depends on luminosity and the interpretation of the observer. While the spectrum of light must be narrowed down to a single source, one searches for features in the spectrum such as absorption lines, emission lines, or other variations in light intensity. If found,...
The commonly accepted explanation is that they move away from us. The redshift in this case is caused by the Doppler effect. Answer2During red shift, the Galaxies are in continuity, experiencing a centrifugal force that balances a center seeking centripetal force. The red shift is not an indicator...
The answer would be C) Parallax.The Absolute Magnitude of a star is the star's actual brightness, and is therefore not dependent upon the position of the observer.Red Shift and Blue Shift are consequences of a stars speed relative to the observer. Again this is independent of the stars proximity to...
1.the observed wavelength of the   dark line from the distant galaxy   has increased   2.therefore the distant galaxy must   be moving away from the Earth   suggesting the Universe is   3.expanding outwards from a small   initial point
consquasars have have large red shift that suggest they are far away as distant galexies some quazars with very high redshifts appear to be interacting with other galexies that have lesser redshift which would suggest that quazars have ann in trensic redshiftprosits perfect evidence to show that the...
The red-shift of a star can tell us two things: - For nearby stars, the red-shift tells us how fast the star is moving away from us. In this case, the red-shift is caused by the Doppler effect, rather than metric expansion. - For very remote stars and galaxies, the red-shift component caused by...
Because if everything we can see is moving away from us, and the further away the faster it's going, if you extrapolate back in time you realize that at some point everything must have been very close together. That's more or less the core of the Big Bang theory. answer2: The Big bang is a bust if...
The red shift IS the Doppler Effect. I use the sound of a car or motor bike passing by on a road. The high pitch of the approaching vehicle suddenly drops to a low pitch as it speeds by and retreats. Note: Cosmological redshift is not attributed to the Doppler Effect, but to the metric expansion of...
An expanding Universe accounts for the red shifts. Light from the galaxies is shifted to the red end of the spectrum because the galaxies are travelling away from us at high speeds, which increases the wavelength of their visible light.
To calculate the relative speed of celestial objects, and also to gauge the distance to the remotest galaxies.
Redshift happen when light seen from the object that is moving away is proportionally increased in wavelength (i.e shifted toward the red end of the spectrum) . Thus red shifts relates that further the galaxy ( outside or inside the local cluster ) more it is red-shifted (i.e greater the wavelength ...
The redshift tells scientists how fast a star or galaxy is moving away from us.