Timeline for How do you prove that mirrors aren't parallel universes?
Current License: CC BY-SA 4.0
22 events
| when toggle format | what | by | license | comment | |
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| Mar 15, 2023 at 20:47 | history | edited | Rubio♦ | CC BY-SA 4.0 |
imgurize an image and reference the animated gif in the comments
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| Oct 13, 2017 at 5:21 | comment | added | Ben Aveling | What would happen if you asked Joe: does magnetism cross between universes, or is it like heat (law #9)? | |
| Dec 8, 2016 at 0:36 | vote | accept | Zxyrra | ||
| Nov 29, 2016 at 4:38 | comment | added | Rubio♦ | Gravity is the effect of mass warping spacetime itself, in accordance to general relativity. While gravity waves propagate through space and could (in principle) cross the postulated boundary between universes (which you could never measure with anything short of a LIGO detector), I don't think it's reasonable to think the curvature of spacetime of a "mirror" universe—that is, its gravity—would somehow "propagate" through the mirror-boundary to ours, or vice versa. Lack of gravity is not sufficient, it's expected. | |
| Nov 28, 2016 at 22:32 | comment | added | njzk2 | forces obviously don't cross mirrors. no need for magnet to show that, the lack of gravity is sufficient. | |
| Nov 28, 2016 at 20:20 | comment | added | JdeBP | Similarly, any household source of (higher frequency) UV light is a good bet, because the "mirror laws" don't account for the fact that real mirrors have reflectance and absorption spectra. Bad luck Rita if it's an aluminium mirror, as she would need an old CRT television or valve radio and some engineering know-how to make an X-ray emitter, but a silver, gold, or copper mirror will not reflect some of the UV and it will be either detectable at the back of the mirror or absorbed. | |
| Nov 28, 2016 at 8:06 | comment | added | Rubio♦ | @Jasen Joe says "Each mirror..." and gives laws for "Mirrors". Not certain, special mirrors; just, "mirrors" — that implies he means all (generic optical) mirrors, not just special kinds or certain types. We're not confining ourselves here to perfect mirrors capable of reflecting all incident EM radiation perfectly; the laws need to work (or not) for a generic optical mirror, which doesn't discernably react to magnetic fields. | |
| Nov 27, 2016 at 2:27 | comment | added | Jasen | A perfect mirror (gamma waves to DC) would be a superconductor, and the magnet would repel its reflection. as predicted by the 10 laws. | |
| Nov 26, 2016 at 19:24 | comment | added | Rubio♦ | Let us continue this discussion in chat. | |
| Nov 26, 2016 at 18:45 | comment | added | supercat | @Rubio: Well, in that case I can't think of any explanation for magnets behind a mirror affecting objects in front; can you? | |
| Nov 25, 2016 at 18:26 | comment | added | Anixx | Perfect mirror would be ferromagnetic. | |
| Nov 25, 2016 at 11:59 | comment | added | crobar | Nice exploitation of one of the few fundamental physical forces in our universe which is always bipolar. If a refrigerator magnet of sufficient strength wasn't available, the neodymium magnets broken out from some decent earphones would do as well, and probably be easier to demonstrate the effect with. | |
| Nov 25, 2016 at 11:13 | comment | added | Zxyrra | @MattiaNocerino I agree, but selecting an answer discourages new askers so I'm gonna wait a bit | |
| Nov 25, 2016 at 11:08 | comment | added | Mattia Nocerino | Come on @Zxyrra, you have to admit that this is the answer, even if it's not what you thought initially | |
| Nov 25, 2016 at 9:17 | comment | added | Ewan | put the mirror flat on the floor and then place the magnet on it | |
| Nov 25, 2016 at 6:08 | comment | added | Rubio♦ | @Jay But magnets aren't blocked by mirror glass. (Not even when backed by an equal thickness of laminate wood.) See? | |
| Nov 25, 2016 at 5:03 | comment | added | Jay | But mirrors have a piece of glass between us and the parallel universe. This glass could block the magnetic field. | |
| Nov 23, 2016 at 23:28 | comment | added | Zxyrra | I don't know, I think I found a more common household item as not everyone has "the good ones" - see my answer | |
| Nov 23, 2016 at 23:25 | comment | added | Dr Xorile | I agree that something would happen! I marked your answer up and think it's great! | |
| Nov 23, 2016 at 23:20 | history | edited | Rubio♦ | CC BY-SA 3.0 |
Incorporate commentary from comments.
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| Nov 23, 2016 at 22:44 | history | edited | Rubio♦ | CC BY-SA 3.0 |
added 461 characters in body
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| Nov 23, 2016 at 22:36 | history | answered | Rubio♦ | CC BY-SA 3.0 |
