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What does the increase in wavelength of light from a galaxy mean?
Wiki User
∙ 6y ago
This is usually expressed, equivalently, as a reduction in frequency. It means that the galaxy moves away from us. For more information, you may want to read about redshift.
Wiki User
∙ 6y ago
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How does a red shift indicate that the universe is expanding?
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. when Edward Hubble studies spectrum of different star he noticed that because of some color spectrum were missing, other spectrum got shifted to ward red. it it moved toward red then that mean that wavelength was increasing and if wavelength increases then that means light moves away from us and thus he concluded that each and every star and galaxy was moving away from each other
What is a red shift and what does it mean for a star?
It's a change (decrease) in the frequency of the light we receive from the star. Equivalently, an increase in the wavelength. It usually means the star is moving away from us, though it might also be caused (usually to a lesser extent) by the star's gravitation.
What does the size of a galaxy mean?
The size of a galaxy means how old the galaxy really is and also the stars indicate how old the galaxy is. So both the size nd the amount of stars indicate how old the galaxy is.
Your nearest neighbor galaxy?
The Andromeda galaxy is 2.6 million light years away.Thats 1.52840995 × 1019 miles away!That is, travelling at the speed of light, it would take YOU 2.6 million years to get there.
How far would a star on the far side of Andromeda be from earth?
The Milky Way galaxy is 100,000 light years across and 1,000 light years thick. But the really fun part is that the Milky Way is all around us. We are right inside the Milky Way; it is our home galaxy. The Milky Way is not far away from you; you are a part of it.
Which wavelength of light has the lowest frequency?
Assuming you mean visible light, that would be red light.
What does nm in calculation of ultraviolet rays mean?
nm = nanometers It is a measure of the wavelength of the light, with energy inversely proportional to the wavelength: E = h / wavelength
What does frequency of light mean?
Light is known to be electromagnetic radiation, and as such it is of waveform nature. As a waveform, it has wavelength and its counterpart frequency.
Which color will have the longest wavelength which corresponds to the lowest energy?
Red
Is all light the same size?
Well light doesn't have a size if you mean frequency or wavelength or even how much light the object releases then no they don't.
How log could it take light to travel to earth from the android galaxy?
I assume you mean M31, the Andromeda Galaxy. It is approximately 2.5 million light-years from us; that means that it takes light 2.5 million years to travel from there to here (or from here to there).
What is the wavelength of light waves?
If you mean visible light, that is between about 380 and 780 nm, depending on the color of the light. nm means nanometer - 1 nm = 0.000 000 001 meter. In other words, the wavelength of visible light is slighty less than a micron.
How does a red shift indicate that the universe is expanding?
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. when Edward Hubble studies spectrum of different star he noticed that because of some color spectrum were missing, other spectrum got shifted to ward red. it it moved toward red then that mean that wavelength was increasing and if wavelength increases then that means light moves away from us and thus he concluded that each and every star and galaxy was moving away from each other
What light rays have the longest wavelength?
The longest wavelength photon I could find out about was in a maser (microwave version of a laser) which uses emission between two hyperfine levels of atomic hydrogen. This had a frequency of 1.4 GHz and a wavelength of 21cm.
What is the wavelength of a light with a frequency of 7.12 x 1014-Hz?
speed of light (c) is equal to the wavelength x the frequency. You can use 3x10^8 m/sec as the speed of light (c) and and solve for wavelength. I would do it here, but I'm not exactly sure what you mean the frequency to be. It has too many sig. figs. to make sense. Unless you mean it to be 7.12 times 10 to the power of 14 (???). If that's really the correct frequency, then just plug it into the above equation and solve for wavelength. It will come out in meters.
What is the wave speed of vissible light?
"Wave speed" is meaningless. Do you mean wavelength? That's roughly 400-700 nm.
What does the nm in 650nm laser diode mean?
"nanometer" or billionths of a meter. 650 nanometers is the wavelength of the light produced by the diode.
