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Results tagged with time-reversal-symmetry
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user 8563
The theoretical symmetry of physical laws under the transformation of time reversal, that is t -> -t.
172
votes
Accepted
Have researchers managed to "reverse time"? If so, what does that mean for physics?
First of all, let's get some important 'sociological' aspects out of the way:
While website you've linked to, phys.org, tries to pass itself off as a science-journalism site, it is nothing of the so …
- 135k
16
votes
Does light reflect if incident at exactly the critical angle?
While the existing answers are not wrong, they brush over a good deal of relevant detail and it wouldn't come amiss to set the record straight on a few counts.
In particular, as regards time-reversib …
- 135k
10
votes
Accepted
What sort of experiment would directly test time reversal invariance?
As an update on this old thread, the 2015 version of the Particle Data Group review on tests of conservation laws (the 2009 version of which was rightly pointed to by invisiblerhino) has an interestin …
- 135k
66
votes
Accepted
Do pear-shaped nuclei really have anything to do with time travel?
To be honest, much of this feels like very irresponsible journalism, partly on the part of the BBC and very much so on the part of Science alert.
If you're looking for an accessible resource to what …
- 135k
6
votes
Time reversal and the solutions to Maxwell equations
The laws of electromagnetism are indeed time-reversal invariant, but this can sometimes be in a fairly restricted sense, particularly when dealing with causality as regards the Liénard-Wiechert potent …
- 135k
13
votes
Accepted
CPT Violation and Symmetry / Conservation Laws
Conservation of energy follows from invariance under translation in time, not inversion. This symmetry states that no matter when you do your experiment, it will give the same results. All isolated sy …
- 135k