All Questions
10
questions
3
votes
1
answer
69
views
Frequency shift of photon using magnetic field
According to GR, it is possible to redshift the frequency of a photon using a magnetic field as demonstrated by the Gerstenshtein Effect:
https://web.archive.org/web/20210225134450/http://jetp.ac.ru/...
- 183
-1
votes
1
answer
127
views
Redshift Due to Expanding Space (not increasing distance) [closed]
Please NOTE: "For example, a question that proposes a new concept or paradigm, but asks for evaluation of that concept within the framework of current (mainstream) physics is OK."
And: "...
- 23
0
votes
2
answers
194
views
Why the CMBR redshift is so higher than the redshift of the most distant therefore oldest galaxies in the universe?
Why the CMBR redshift is so higher than the redshift of the most distant therefore oldest galaxies in the universe? We know that cosmological redshift rises with distance from the object but at ...
- 2,255
1
vote
1
answer
34
views
If cosmological redshift causes wavelength elongation does it mean the whole emitted signal is elongated?
If cosmological redshift causes wavelength elongation does it mean the whole emitted signal is elongated? Let say we have ten waves on the see hitting the shore.... If we somehow elongate every single ...
- 2,255
1
vote
3
answers
130
views
Can cosmological redshift only decrease photons' energy by increments (that correspond to Planck's constant)?
I have read this question:
The equations that govern quantum mechanics predict that the angular momentum (that is, spinning or orbiting) in a system can't take on any value, but instead come in lumps....
- 29k
1
vote
1
answer
106
views
CMB - Excess Energy? [duplicate]
Today in physics we were looking at how the energy of a photon is the product of Planck's constant and the frequency of the photon, therefore the lower the frequency, the lower the energy of the ...
53
votes
4
answers
12k
views
Red shifted to what?
I searched and found a lot of questions and answers about red shift here but none with the answer to mine. (sorry if it is there somewhere and I did not find it.)
Everyone is saying the light from ...
- 611
-2
votes
1
answer
213
views
Tired light question
How do we arrive at the conclusion that redshifted light from cosmological sources has 'lost' energy during its transit from source to us? If in fact no actual measurement of the energy of the ...
- 49
3
votes
1
answer
457
views
Can the wave length of a photon be stretched out caused by expansion of spacetime? [closed]
Strictly speaking perhaps it is not right to say that a photon is a wave so its wave length can't be stretched out; a photon is actually just a point. So is its wave property only a relativistic ...
- 3,348
5
votes
2
answers
594
views
Finding the cosmological redshift of a galaxy in the expanding Universe
Firstly, I understand what the Doppler effect is when it comes to sound or light waves.
From everything that I've read, we are told that the universe is constantly expanding since the all the ...
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