0
How do scientists use Doppler shift to support the big bang theory?
Wiki User
∙ 12y ago
It is called The Big Bang Theory, actually.
Doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are. According to the Big Bang Theory, the universe began with an enormous explosion. Then, the entire universe began to expand everywhere at the same time.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThe doppler effect has a lot to do with it as the light moving away from a source is redshifted as the wavelengths are increased, and the light that moves away from a source is blueshifted as the wavelengths are decreased. This supports the big bang as all of the galaxies are actually accelerating away from each other as if they were thrown out into emptiness, this is supported by the redshifted astronomers have discovered
Wiki User
∙ 12y agoAlmost all other galaxies displayed a red shift which meant that everything was moving outward. This supported the idea that the universe is expanding. Also, they found that galaxies farther away were moving away faster than those closer, also supporting the big bang theory.
Extrapolating the directions and speed in reverse, everything came together at a single point. This was the point of the big bang.
Wiki User
∙ 13y agoAnything moving toward you looks slightly bluer, anything moving away slightly redder. The only galaxy with a blue shift to us is the Andromeda galaxy. This is just like how a train moving toward you gives off high pitch noise but then lower pitch when it is moving away.
More importantly though galaxies that are further away have stronger red shifts. So much so that many are moving away from us faster than the speed of light. Except things cannot move faster than that, and those galaxies don't really move at all. Instead it is space that expands. Because of this every point in the universe looks like the center with nearly everything moving away from it, except for things that are close enough for gravity to pull them toward each other.
Wiki User
∙ 10y agoActually it is the other way around - i.e. the Doppler shift helps to support and explain the Big Bang Theory. Edwin Hubble is credited with the discovery that the distances to far away galaxies are generally proportional to their redshifts (as in the Doppler effect); an idea which was originally predicted by Lemaître in 1927. Hubble's observation was taken to indicate that all very distant galaxies and clusters have an apparent velocity directly away from our vantage point: the farther away, the higher the apparent velocity.
Wiki User
∙ 11y agoThe Doppler effect is a shift frequency. If the frequency is lowered this is called a redshift (the opposite is called a blueshift). The redshift is said to support the expansion of the Universe , a tenant of the Big Bang theory.
Put simply, objects travelling away from us emit a (very) subtle blue, and, objects travelling towards us emit red. Most galaxies appear red, but some, such as M31, appear blue. This means M31 and our galaxy will eventually collide in, give or take, 3.75 billion years.
Hubble initially observed the universe is larger than the mere Milky Way galaxy. He identified several astronomical bodies in other galaxies, including the Andromeda Nebula. His discovery was opposed by current observation, but htey were over turned with time. He subsequently discovered distant galaxies were receding. They have, what is called, "radial velocity".
AnswerEdwin Hubble discovered that the Redshift effect can be observed in the light spectra of galaxies, known today as Hubble's Law it establishes that the universe is indeed expanding.This supports the Big Bang theory as it self-evidently proves that there was a point of origin (i.e. primeval atom).
Wiki User
∙ 12y agoThe usual interpretation - in fact, the only reasonable explanation - for the doppler shift is that the galaxies are moving away from us. The greater the distance to a galaxy, the faster it moves away from us. Therefore, the Universe is expanding.
Wiki User
∙ 11y agoEdwin Hubble did a lot of work on "Red Shifts" in the spectra of galaxies.These are
caused by the Doppler effect or a similar effect (the cosmological red shift).
However, a lot of this was before the big bang theory.
Georges Lemaitre was the first to use the data to suggest the Universe started in
a "big bang", although that term wasn't used until later.
Wiki User
∙ 12y agoThe redshift is usually interpreted as a Doppler shift. It turns out that (under this interpretation) most galaxies are moving away from us - hence, the Universe is expanding.
Wiki User
∙ 14y agoThe Doppler effect observed that all the planets were moving away from each other, which created the Big Bang theory. Hope this helps :)
Add your answer:
Earn +20 pts
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.
Explain why some stars in the milky way galaxy have a blue shift Doppler effect and other stars in the milky way have a red shift Doppler?
A blue-shift means an object is moving towards us, a red-shift means it is moving away from us. Blue-shift and red-shift are changes in frequency of the light we receive, due to the relative movement. This is called the Doppler effect.
What did Hubble find that helped the Big Bang theory?
Edwin Hubble, using the Hooker telescope at Mount Wilson, is credited with the discovery that the distances to far away galaxies are generally proportional to their redshifts (as in the Doppler effect); an idea which was originally predicted by Lemaître in 1927. Hubble's observation was taken to indicate that all very distant galaxies and clusters have an apparent velocity directly away from our vantage point: the farther away, the higher the apparent velocity. Other supportive evidence for the big bang Theory - Cosmic Microwave Background Radiation has been discovered and it is suggested that this has been left over from the Big Bang and galactic clusters are still moving away from each other at an ever increasing acceleration.
Who is the discoverer of the red shift?
The change of frequency of waves, depending on relative movements, is usually attributed to Mr. Doppler. The fact that most galaxies move away from us (as evidenced by the redshift) is the result of the work of Mr. Hubble.
What is the Doppler shift as it applies to light from stars?
You've probably heard the old classical description of the Doppler effect; if you're standing still near a train track, you can hear the sound of the moving train shifted to a higher frequency as the train is coming toward you, and as the train passes by, you can hear the sound shift down in pitch. The sound waves are bunched up a bit as the train is coming toward you, and you hear the train at an increased tone; when the train passes by and moves away from you, the sound waves are stretched out so you hear the sound at a lower pitch. By measuring the change in the sound, you can calculate quite accurately how fast the train was moving when it passed by. For stars, we're not listening to a tone; we're measuring the light spectrum, but the principle is the same. We know what the "normal" frequencies in the starlight would be, for a star not moving towards us or away from us. We measure specific spectrum patterns called "absorption lines". We can detect shifts in these patterns. So, we can measure whether the star is coming toward us (spectral lines at higher frequencies than normal) or is headed away from us (spectrum showing lower frequencies than normal). When we measure the light - and the Doppler shift - of other stars in our Galaxy, we see a mix of stars moving toward us, and stars moving away from us. This is perfectly normal. But when we measure the Doppler shift of the light from other galaxies, we see that most of the other galaxies are moving away from us, and that the farther away they are, the faster they are moving! Note: For those who like a bit of extra detail: The change in the light from distant galaxies is not a true Doppler shift. It's similar, but is caused by the expansion if space itself.
How can you use Doppler shift in a sentence?
Doppler shift is the change in frequency of a wave that seems to occur as it moves. Scientists study the doppler shift to see whether stars are moving away from or toward our galaxy.
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?
The Doppler effect. By measuring the Doppler shift, scientists can determine the direction and speed of movement.
How does red-shift support the steady state theory?
Red shift does not support the steady state theory.
What is an explanation of the Doppler shift?
The Doppler Shift is a change in frequency due to the Doppler Effect.
How did the Doppler effect lead to the Big Bang theory?
Actually, it wasn't the Doppler-effect that lead to the Big Bang theory, but the red-shift of remote galaxies. Although it was initially thought that this red-shift might be caused by a Doppler-effect, it is now understood that this red-shift is caused by the metric expansion of space itself.
Would the big bang theory help explain the shift?
I presume the question refers to the "redshift" of distant galaxies. Actually it is the other way around - i.e. the Doppler redshift helps to support and explain the Big Bang Theory. This "redshift" is called the "cosmological redshift". Strictly speaking, it's not the 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
How is the Big Bang theory supported by the observed Doppler shift of galaxies?
Doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are. According to the Big Bang Theory, the universe began with an enormous explosion. Then, the entire universe began to expand everywhere at the same time.The doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are.
What is the wavelength shift caused by local motions?
Doppler shift
Who discovered the Doppler red shift?
The Doppler redshift was discovered by Hippolyte Fizeau in 1848.
Why would a passing race car display more Doppler effect than a passing police siren?
The amount of Doppler shift depends on speed - the faster vehicle will show more Doppler shift.
What is a Doppler red shift and a Doppler blue shift?
A Doppler red-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward longer wavelengths. Such a shift can be caused by the star's moving away from us, and that's how it's interpreted when astronomers see it. A Doppler blue-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward shorter wavelengths. Such a shift can be caused by the star's moving toward us, and that's how it's interpreted when astronomers see it.
