All Questions
Tagged with electromagnetic-radiation photon-emission
5
questions
12
votes
4
answers
2k
views
How is light emitted by an incandescent lamp?
I am looking for better understanding of how light is produced in an incadescent lamp. More specifically: how is the kinetic energy of electrons converted to light?
Are we dealing with interband ...
- 60.3k
15
votes
3
answers
2k
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Why don't absorption and emission lines cancel out in our Sun?
I was looking at this answer on why absorption lines and emission lines don't cancel out:
An experiment shining light on the material and looking at the
reflected spectrum will see absorption ...
- 2,005
2
votes
1
answer
99
views
Do all matter emits radiation at all wavelengths? [duplicate]
Does all matter emit radiation at all wavelengths? Do gasses also emit radiation at all wavelengths since they have a specific emission spectrum? Shouldn't they only emit radiation according to their ...
- 647
6
votes
2
answers
4k
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How many photons are there in free space on average
Estimates of the amount of for example "dark matter" are of interest to the cosmologists. However, I have never seen an estimate of how many "free" photons could be speeding about in the known ...
- 1,302
2
votes
1
answer
415
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Does shaking an atom produce photons?
I have a vague recollection of a description of the relationship between matter and light. It went something along the lines of this: "Grab hold of a thing and ...
- 924