All Questions
8
questions
1
vote
3
answers
116
views
How does light fill the entire universe? [duplicate]
Light is a particle and a particle is discrete. So say light is emitted from a star 7 billion years far, how is it possible that this light particle emitting from a star fills every point in the ...
- 283
0
votes
3
answers
40
views
Are the constituents of the known universe matter (including antimatter) and electromagnetic radiation?
Is it correct to say that the constituents of the known universe are matter (including antimatter) and electromagnetic radiation, leaving aside the comparatively hypothetical ‘dark’ entities? This is ...
- 135
4
votes
1
answer
228
views
How much energy is in the Universe as photons? [duplicate]
The mass of Universe in kilograms is about 10 power 53.
But how much energy exists in the Universe in form of photons?
And if they would all be converted into mass, how much mass that would make?
Dark ...
- 233
0
votes
1
answer
47
views
What does a universe look like where light cannot lose energy and is emitted all the time? [closed]
In a universe where light cannot lose energy, and is emitted all the time, what is the result?
- 1
14
votes
1
answer
4k
views
What percentage of the mass/energy of the universe is in the form of electromagnetic waves? [duplicate]
Is there any theoretical framework or model that would lead to a prediction, either precise or approximate, about how much or what proportion of the universe's total mass is in the form of photons, or ...
- 533
0
votes
0
answers
70
views
Matters Including Resolution of Olbers' Paradox
Is there evidence for galaxies receding from us faster than the speed of light? If so,that might help resolve Olbers' paradox, though other factors must also be taken into consideration. Could such a ...
- 1,710
2
votes
2
answers
244
views
What happens when the wavelength of light becomes as large as the observable universe? [closed]
Say the wavelength of a photon became so large that it approached the size of the observational universe. Does something unexpected happen?
0
votes
2
answers
395
views
Origin of electromagnetic radiation in the universe
I don't know if the total electromagnetic radiation in the universe is finite or not.
But either way: what is the origin of the electromagnetic radiation in the universe? Can we say that all of it ...
- 156