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The Doppler effect causes objects that are moving towards an observer to increase in frequency while those that move away from an observer decrease in frequency. In 1920s and 1930s, Edward Hubble was measuring the Doppler shift of various stars in the night sky, and discovered that there were fa more shifted towards the red spectrum (lower frequency) then the blue spectrum (higher frequency). Hubble concluded from this fact that the universe is constantly expanding outwards, and formulated Hubbles Law to approcimate the rate of universal expansion.
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What does the Doppler Effect tell astronomers about the universe?
It tells us that the Universe is expanding.
What can the Doppler effect tell us about in astronomy?
It can tell us whether a star, or a galaxy, is moving towards us or away from us.
How does the Doppler effect aid police in detecting speeding motorists?
Police speed traps using Radars rely on Doppler to tell vehicle speed.
How can you tell if there's more than one universe?
UniversesNo one can surely answer that, but some scientists believe that there are more than one universe. They call this multiverse.
What is the effect of many animals on borneo are threatened?
scientists did not tell people exactly where they found the toads.
What does the Doppler affect tell us?
The Doppler effect tells us that the frequency of a wave changes when the source of the wave or the observer is in motion relative to one another. This change in frequency results in a shift in the perceived pitch of sound waves or the perceived color of light waves.
Do you use the Doppler effect or particle accelerators to measure the speed of stars?
The Doppler effect is used to detect whether a star is moving away from us or towards us. This method doesn't tell us anything about a star's "sideways" movement. OR The Doppler Effect should be corrected for the (gravitational) size of the star, since gravity also changes the light's energy. re: Sideways movement, I thought special relativity reacts to sideways motions? Besides, how long can a star be traveling sideways -- technically, no distance.
How can you tell that some galaxies are far away and moving rapidly towards us?
You can tell by the blueshift in the spectrum; the only reasonable explanation for this blueshift is the Doppler effect. - Please note that most galaxies are moving away from us, not towards us.
What does the redshift tell us about the universe?
Redshift is a phenomenon where light from distant galaxies appears redder than expected due to the expansion of the universe. It tells us that the universe is expanding and provides evidence for the Big Bang theory. By studying the redshift of galaxies, scientists can understand the rate of expansion and the age of the universe.
How is the Doppler Effect related to the Big Bang Theory?
That the distance between us and all distant galaxies is expanding, helping to support Big Bang Cosmology. Answer2: Hubble's red shift is an indicator of the distance of the object v=HD the longer the distance D the greater the red shift velocity v. Hubble said the red shift is a "hitherto unrecognized principle of nature". The red shift is a measurement without a theory of the measurement. The Theory of the big Bang relies on the red shift. The Big Bang is not an expanding open universe, it is more like an exited atom. When an atom is excited the outer electrons expand away from the nucleus to a higher level. The universe is doing the same thing. Hubble;s Constant H = dR/Rdt =c/R = 2E-18 = c/150E24 m. Hubble;s Constant is the speed of light divided by the radius of the universe. The Hubble metric is 2R-18x31E21 = 62km/s/Mparsec. This indicates the Universe at max Energy is 150E24meters approx. 16 Billion Light years(BLY). Like the excited atom the universe is expanding to a stable level at a lower energy and a larger size. assume the size of the universe now is atound 48 Billion light years, then the expansion is a factor of three 46BLY/16BLY = 3 = e(Ht), assuming exponential expansion. Then this would would imply that Ht= ln 3= 1.0986 and indicate that t= 1.0986/2E-18 = 5.493E17= 17.4 Bly is the age of the Universe now! The Universe was 16 BLY before the "Big Bang".. The red shift tells us how far from we are from the edge of the Boundary., v=HD = c if we are at the boundary, v= HD = c/R D = cD/R = c (D/R) if D=R then v=c..
Which technologies that predict tornadoes do scientists think are going to prove more useful in the future?
The most useful too scientists have right now is Doppler radar, which can detect rotation in a storm. It is going to be the most valuable too for the foreseeable future. The latest improvement is dual polarization, which allows the radar to tell apart rain, hail, and debris.
What causes a redshift in light from stars?
No. The Doppler shift tells us if the object is moving toward us or away, and how fast. But it says nothing at all about whether, or how fast, the object is moving to the side. Doppler tells us about the part of the velocity that is TOWARD or AWAY. It says nothing about its velocity left, right, up or down.
