Timeline for Do two beams of light attract each other in general theory of relativity?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Oct 20, 2022 at 2:34 | comment | added | Ilya Zakharevich | In my preceding remark, it is better to replace “mass” by “momentum”. | |
| Oct 19, 2022 at 11:32 | comment | added | Ilya Zakharevich | Why this “conversely”?! If photons have different energies, just model them by ultra-relativistic particles of the same velocity but with different masses. | |
| Oct 19, 2022 at 11:30 | comment | added | Ilya Zakharevich | The notion of “rest mass” exists only in popular-science paraphrases of General Relativity. In GR, gravitational effects depend on the tensor of energy-momentum. Being a tensor, you cannot “express it” using a single number! (There are very few contexts where “rest mass” can be assigned some sense — as below — but still, it does not determine the gravitational effects!) | |
| Sep 17, 2022 at 16:50 | comment | added | Peter Bernhard | Conversely, if two photons are of different energy, there should be gravitational force? - "If they were at rest w.r.t. each other, ...": Rest mass is zero, hence gravitational force is zero? | |
| Jul 22, 2020 at 3:30 | history | edited | Ilya Zakharevich | CC BY-SA 4.0 |
A missing article, and c²→c⁴
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| Jul 22, 2020 at 1:25 | review | First posts | |||
| Jul 22, 2020 at 1:35 | |||||
| Jul 22, 2020 at 1:20 | history | answered | Ilya Zakharevich | CC BY-SA 4.0 |