Timeline for Question about comoving frame
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 17 at 14:04 | vote | accept | TopoLynch | ||
| Sep 17 at 13:52 | comment | added | Sten | @TopoLynch Proper distance is $\int ds=a\int dx$. | |
| Sep 17 at 10:40 | comment | added | TopoLynch | Thank you for your answer! However, there is something I do not understand: when expressing the line element as $ds^2=-dt^2+a^2(t)dx^2$, $x$ is here a comoving coordinate, right?. Then, why is it used to calculate the proper distance? | |
| Sep 16 at 18:26 | history | answered | Sten | CC BY-SA 4.0 |