Timeline for Do units have to make sense in Physics?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Mar 31, 2021 at 22:46 | comment | added | Kostya | @Ian The whole point of relativity theory is that time and space are kinda "the same" and can be (pseudo)rotated into each other. physics.stackexchange.com/a/80410/386 | |
| Mar 31, 2021 at 13:58 | comment | added | Ian | @Kostya They are not the same units. That $1$ is a dimensional $1$: it provides the conversion factor from a time measured in seconds to a length measured in light-seconds. | |
| Mar 31, 2021 at 10:57 | history | edited | Steeven | CC BY-SA 4.0 |
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| Mar 31, 2021 at 10:45 | comment | added | Kostya | you can't suddenly move a distance of "seconds" - when doing relativity we routinely use units where $c=1$. So length and time are measured with the same units. | |
| Mar 30, 2021 at 10:15 | comment | added | Steeven | @Umaxo Yes, I might add to the answer that I am assuming usual units and not natural units or other alternative unit systems. | |
| Mar 29, 2021 at 20:37 | comment | added | Umaxo | measuring distance in seconds is usual practice as is measuring distance in kilograms (or mass in meters? I do not remember which one...). The only requirement for units is that in every equation units in each term are equivalent to each other so that we are working with quantities that are defined at the common scales. | |
| Mar 29, 2021 at 15:27 | history | edited | Steeven | CC BY-SA 4.0 |
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| Mar 29, 2021 at 14:57 | comment | added | Tachyon | Great answer! My preconceived notions about units were baseless, and I learned that there is as much rigor for units as there is for actual solutions of equations. Thanks. | |
| Mar 29, 2021 at 12:32 | history | edited | Steeven | CC BY-SA 4.0 |
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| Mar 29, 2021 at 12:18 | history | answered | Steeven | CC BY-SA 4.0 |