Timeline for Can photons be created without an electric charge involved?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Jan 9, 2017 at 15:53 | comment | added | akhmeteli | @rob : I agree that this process is economically hopeless:-) | |
| Jan 9, 2017 at 14:35 | comment | added | rob♦ | While this is technically correct, the neutron's magnetic moment and mass are so small that, for non-relativistic (i.e. earth-scale or sun-scale) gravitational fields, any radiation would be of order nano-eV. For comparison, CMB photons are micro-eV. | |
| Dec 7, 2016 at 6:01 | comment | added | akhmeteli | @HolgerFiedler: According to en.wikipedia.org/wiki/…, a charge falling in a gravitational field still radiates with respect to an observer at rest. I guess the same is true for a magnetic moment. While I agree that "Acceleration of neutrons by photons is a realistic scenario", it does not make much sense in the context of the OP's question: why create a photon by acceleration of a neutron by photons? You already have photons, if you accelerate the neutron, using them, right? | |
| Dec 7, 2016 at 5:37 | comment | added | HolgerFiedler | akhmeteli The freefall in gravitational field is not an acceleration at all, the particles follow geodesic paths (and do not feel any acceleration). - Acceleration of neutrons by photons is a realistic scenario and from the fact of the momentum transfer follows a photon emission during deceleration. | |
| Dec 6, 2016 at 18:10 | comment | added | akhmeteli | @LeosOndra: That is correct. I mentioned neutrons because you mentioned them in your question:-) If you need something "cleaner", consider neutrino-antineutrino annihilation (sciencedirect.com/science/article/pii/0029558266902331) | |
| Dec 6, 2016 at 18:00 | comment | added | Leos Ondra | Reading the Wikipedia article on Neutron magnetic moment (en.wikipedia.org/wiki/Neutron_magnetic_moment) I think that its magnetic moment arises from charged quarks inside, so we are again at electric charge, isn't it? | |
| Dec 6, 2016 at 17:49 | comment | added | akhmeteli | @HolgerFiedler: But I mentioned acceleration by gravitation field, not by photons. | |
| Dec 6, 2016 at 15:49 | comment | added | HolgerFiedler | Why I'm not surprised? Since the neutron can be accelerated by photons and by this some momentum over goes to the neutron so during deceleration some photons have to be realized. | |
| Dec 6, 2016 at 14:57 | comment | added | akhmeteli | @LeosOndra: Yes. en.wikipedia.org/wiki/… | |
| Dec 6, 2016 at 13:20 | comment | added | Leos Ondra | So magnetic moment is enough to create photons? | |
| Dec 6, 2016 at 12:12 | review | Low quality answers | |||
| Dec 6, 2016 at 14:43 | |||||
| Dec 6, 2016 at 11:53 | history | answered | akhmeteli | CC BY-SA 3.0 |