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At 16 hours ago, Gramiscus wrote:

i'm pretty sure if you zoom in small enough there are some events that exhibit time reversal symmetry. in this way, time is only unidirectional for macromolecular objects of sufficient size.

didn't read this early on.

this is generally not true. there is a theorem in quantum physics that says CPT symmetry should be preserved. so, for some process, a violation of CP symmetry means T symmetry is not preserved also.

At 4 days ago, Halberd wrote: You guys should watch that t.v show that Morgan Freeman narrates that talks about time. Its very interesting.

Through The Wormhole?

At 36 minutes ago, i-am-ghey wrote:
this is generally not true. there is a theorem in quantum physics that says CPT symmetry should be preserved. so, for some process, a violation of CP symmetry means T symmetry is not preserved also.

i can't come up with a real reaction that do not involve spontaneous break of CP symmetry. sure, all the nice symmetries are preserved in the schrodinger equation (as well as its relativstic form), but as you include terms that are not very nice in the lagrangian, CP symmtery is almost always broken.

(at least it happens so from very few things that i have learnt, which is not much.)

Time is an illusion. Lunchtime, doubly so!