Virtual particles
Virtual particles
Do virtual particles time travel backwards in time the way tachyons do?
- neufer
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Re: Virtual particles
An particle is a particle that moves forwards in time.outlaw wrote:
Do virtual particles time travel backwards in time the way tachyons do?
An antiparticle is a particle that moves backwards in time.
A tachyon is a particle that hardly moves at all in time.
A virtual particle is often a particle that moves in a closed loop (forwards, backwards & hardly at all) within a short span of time.
Art Neuendorffer
Re: Virtual particles
Virtual Seems to me that if it does what all the others do separately, then it should be called an 'allticle'
To find the Truth, you must go Beyond.
Re: Virtual particles
i thought nothing can travel backwards in time without violating causality?
- Chris Peterson
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Re: Virtual particles
Causality is only violated if information is sent backwards in time. All the tricky theory around virtual particles manages to avoid that.outlaw wrote:i thought nothing can travel backwards in time without violating causality?
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Re: Virtual particles
so virtual particles are not traveling backwards in time? or are they traveling backwards in time without information?
- Chris Peterson
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Re: Virtual particles
They travel backwards in time in a manner that doesn't carry information from the future.outlaw wrote:so virtual particles are not traveling backwards in time? or are they traveling backwards in time without information?
Chris
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Chris L Peterson
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Re: Virtual particles
i was also reading that some people dont think virtual particles dont exist.is this a view?
Re: Virtual particles
so they do some sort of sci fi stuff without information?Chris Peterson wrote:They travel backwards in time in a manner that doesn't carry information from the future.outlaw wrote:so virtual particles are not traveling backwards in time? or are they traveling backwards in time without information?
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Re: Virtual particles
I wouldn't put it that way. It's just the way the math that describes things works out. Nobody said that everything in the Universe needs to be obvious or intuitive. Indeed, very little is.outlaw wrote:so they do some sort of sci fi stuff without information?
Chris
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Chris L Peterson
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Re: Virtual particles
i also read that there are experts who think they are mathematical and are not real?Chris Peterson wrote:I wouldn't put it that way. It's just the way the math that describes things works out. Nobody said that everything in the Universe needs to be obvious or intuitive. Indeed, very little is.outlaw wrote:so they do some sort of sci fi stuff without information?
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Re: Virtual particles
There are people who think that about "ordinary" particles like electrons and photons, as well- and not unreasonably. In the end, we don't really know what the "real" nature of most things is like. All we have is highly useful physical and mathematical models that tell us how things behave. The relationship between those models and "reality" is more a question for philosophers than scientists.outlaw wrote:i also read that there are experts who think they are mathematical and are not real?
The bottom line is that a theory of virtual particles allows us to understand observations, and make predictions, which no other theory can currently do. So most physicists are perfectly willing to accept them as "real".
Chris
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Re: Virtual particles
is there evidence for virtual particles? i also read of a physics professor named arnold neumier who says that virtual paticles dont exist.Chris Peterson wrote:There are people who think that about "ordinary" particles like electrons and photons, as well- and not unreasonably. In the end, we don't really know what the "real" nature of most things is like. All we have is highly useful physical and mathematical models that tell us how things behave. The relationship between those models and "reality" is more a question for philosophers than scientists.outlaw wrote:i also read that there are experts who think they are mathematical and are not real?
The bottom line is that a theory of virtual particles allows us to understand observations, and make predictions, which no other theory can currently do. So most physicists are perfectly willing to accept them as "real".
- neufer
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Re: Virtual particles
Considering the reality of wave-particle duality is there evidence for actual particlesoutlaw wrote:
is there evidence for virtual particles? i also read of a physics professor named arnold neumier who says that virtual paticles dont exist.
(other than the apparent mechanism through which waves irreversibly interact)?
Art Neuendorffer
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Re: Virtual particles
Previously answered. Yes.outlaw wrote:is there evidence for virtual particles? i also read of a physics professor named arnold neumier who says that virtual paticles dont exist.
Chris
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Re: Virtual particles
yes what?Chris Peterson wrote:Previously answered. Yes.outlaw wrote:is there evidence for virtual particles? i also read of a physics professor named arnold neumier who says that virtual paticles dont exist.
- Chris Peterson
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Re: Virtual particles
Yes, there is evidence for the existence of virtual particles. If there weren't, the underlying theory would be much less widely accepted.outlaw wrote:yes what?Chris Peterson wrote:Previously answered. Yes.outlaw wrote:is there evidence for virtual particles? i also read of a physics professor named arnold neumier who says that virtual paticles dont exist.
Evidence doesn't mean proof, and it doesn't mean a better theory might not come along later. But the theory is pretty solid, and certainly not something highly speculative (like string theory, for example).
Chris
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Re: Virtual particles
you also said they travel from future to present? are there experts who think that virtual particles don't exist?and also hawking radiation deal with virtual particles but has never been observed.