Questions tagged [gravitational-redshift]
182 questions
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Interpretation of red shift
We see light as having travelled in a straight line from stars or galaxies light years away from us. However it's path is more likely of multiple curves as a result of gravity along the journey (gravitational lensing) . How can we be sure that the…
Doug
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Solar gravitational redshift problem
At hyperphysics the formula is:
$$ \frac{\nu_\infty}{\nu_0} = \sqrt{1 - \frac{2GM}{c^2r}} $$
I found this article in which the authors
have studied the wavelengths of a large number of solar iron lines
observed near the center of the disk. They…
user157860
- 681
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Is it possible to gravitationally redshift light so much that it reverses direction?
I know that redshifting does not mean that light is actually going slower but rather just reducing the energy. Is there a point that the energy is actually reduced to zero and then continues to "negative/reverse" energy making the light go…
Joe
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Red Shift Effects
I dong know much about physics, but I was curious about the red shift effect. I think I have the basic idea of it down in that as an object 1 accelerates from object 2 the light from object 1 will appear more red to object 2 because it stretches the…
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Components in the calculation of the Sun to Earth redshift
When I see calculations of the Sun’s redshift as seen from Earth I believe, as I understand it, that 1) the gravity potential at the emission point near the Sun is taken into account, then 2) the Sun’s gravity potential at the Earth’s orbit and…
Mikael Jensen
- 351
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Gravitational Redshift between spacecraft
I am trying to determine the frequency redshift when a signal is sent between two spacecraft orbiting a star at different radii. I have not been able to find a formula for this, I can only find formula for a signal emitted at a particular radius…
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Frequency difference between electromagnetic wave generated in gravitational field and far beyond
Lets take the hydrogen line frequency of $h_0=1420405751.7667\,\text{Hz}$. This is the frequency we get if the generating hydrogen atom is located far away in space where there is (nearly) no gravity.
When the wave reaches us on earth, it is blue…
Harald
- 739