Timeline for Why do people say we need general relativity in order to explain why light is affected by gravity? [duplicate]
Current License: CC BY-SA 4.0
10 events
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| Mar 5, 2021 at 11:49 | history | closed | John Rennie general-relativity Users with the general-relativity badge or a synonym can single-handedly close general-relativity questions as duplicates and reopen them as needed. | Duplicate of How can gravity affect light? | |
| Mar 4, 2021 at 21:13 | comment | added | Matt | @Eletie, thanks! | |
| Mar 4, 2021 at 18:43 | comment | added | Eletie | @Matt ... which of course leads to the conclusion that light being massless means no gravitational interaction. This is how I'd interpret the statement anyways. Either way, we need to resort to GR to fit observation. The answers here (and links therein) regarding why relativistic mass in Newtonian gravity doesn't work may be useful too physics.stackexchange.com/questions/521369/… | |
| Mar 4, 2021 at 18:41 | comment | added | Eletie | @Matt I've actually not seen people make the statement you mention; only that GR is needed to correctly explain how light interacts with gravity. The point is that you're trying to use Special Relativistic formula with Newtonian gravity, which we know results in contradictions, but I think I see your argument. The counter-argument is that it just doesn't work when trying to interpret the mass in Newtonian gravity as the relativistic mass (which is bad practice anyway); so that's reason enough to only use the invariant mass in Newtonian gravity... | |
| Mar 4, 2021 at 17:43 | comment | added | Matt | Eletie, thanks, that's very helpful. It explains why GR relativity is necessary to explain the details of light's orbits. But it technically doesn't answer why people are explaining it as having anything to do with light's lack of mass. | |
| Mar 4, 2021 at 17:35 | comment | added | mmesser314 | This might help. Why can't I do this to get infinite energy? | |
| Mar 4, 2021 at 17:35 | review | Close votes | |||
| Mar 5, 2021 at 11:49 | |||||
| Mar 4, 2021 at 17:16 | answer | added | Señor O | timeline score: 2 | |
| Mar 4, 2021 at 17:15 | comment | added | Eletie | Does this answer your question? What would be the photon's effective mass in Newton's Law of Gravitation? | |
| Mar 4, 2021 at 17:11 | history | asked | Matt | CC BY-SA 4.0 |