SR and QED: How Particles Interact with Time Dilation

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Discussion Overview

The discussion revolves around the interactions of particles moving at relativistic speeds, particularly in the context of special relativity (SR) and quantum electrodynamics (QED). Participants explore how time dilation affects these interactions, including the creation of particles from energy and the behavior of particles in different media.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants question how particles moving near the speed of light interact with their surroundings, particularly regarding time dilation.
  • There is a suggestion that particles in a vacuum behave as if stationary, while those in a medium lose speed quickly.
  • One participant asks whether collisions can be considered a form of interaction, leading to discussions about conservation laws in special relativity.
  • Another participant raises the question of whether protons inside a nucleus experience time dilation and how that might affect their strong interactions.
  • Some participants discuss the decay of particles, such as muons, and how this relates to the creation of other particles, although there is confusion about the specifics of these processes.
  • There is mention of the electromagnetic interaction being easier to measure compared to strong or weak interactions, but the reasons for this are debated.
  • One participant expresses a desire to understand the interaction processes of particles under significant time dilation, linking it to biological processes, which leads to further clarification requests.
  • Participants discuss the effects of time dilation on biological processes, but there is disagreement on how this relates to the original questions about particle interactions.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of how time dilation affects particle interactions. Multiple competing views and questions remain unresolved throughout the discussion.

Contextual Notes

Some participants express uncertainty about the definitions and implications of time dilation, particularly in relation to particle interactions. The discussion includes various assumptions about the nature of interactions and the conditions under which they occur, but these remain largely unaddressed.

nitin_zilch
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SR and QED: how?

how the particle moving at a speed near to that of light interact to it's surrounding,considering the very fact of it's time dilation?

what i mean to ask probably is that will it b possible for this particle to create another one from it's energy and still manage to throw the created particle with a speed again comparable to that of light?
 
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nitin_zilch said:
how the particle moving at a speed near to that of light interact to it's surrounding,considering the very fact of it's time dilation?

what i mean to ask probably is that will it b possible for this particle to create another one from it's energy and still manage to throw the created particle with a speed again comparable to that of light?

hi nitin_zilch! :smile:

if it's going through a vacuum, it will be exactly as if it's stationary (that's relativity) …

if it's going through a stationary medium (like air), it'll lose speed very fast :wink:

(i don't understand why you thought it might "create another one" :confused:)
 


if particle is traveling in any medium, won't it interact??

if it does how?
and if it doesn't why not??

u can consider a proton inside nucleus and then apply the same question to it
 


can u explain proton-neutron interaction inside nucleus considering time dilation?




tiny-tim
 
nitin_zilch said:
if particle is traveling in any medium, won't it interact??

if it does how?
and if it doesn't why not??

it will collide with the particles in the medium
u can consider a proton inside nucleus and then apply the same question to it
nitin_zilch said:
can u explain proton-neutron interaction inside nucleus considering time dilation?

that would be through the strong nuclear interaction …

it has nothing to do with time dilation
 


nitin_zilch said:
what i mean to ask probably is that will it b possible for this particle to create another one from it's energy and still manage to throw the created particle with a speed again comparable to that of light?
Are you thinking of something like the decay of a muon into an electron, an electron-antineutrino, and a muon-neutrino? If so, can you re-cast your question in terms of that reaction? If not, can you give a concrete example for your question?

Also, as tiny-tim mentioned the proton-neutron interaction is via the strong force and muon decay is via the weak force, so neither are really relevant to the thread title on QED.
 
Last edited:


the question is for all



isn't collision also a way of interaction??
 


tiny tim


protons inside nucleus are moving at very high velocity,will at that speed time dilation occurs with it's simultaneous strong interaction?
 
the time dilation is negligible

even if it was large, it would still have no effect on the strong nuclear interaction
 
  • #10


nitin_zilch said:
how the particle moving at a speed near to that of light interact to it's surrounding,considering the very fact of it's time dilation?

what i mean to ask probably is that will it b possible for this particle to create another one from it's energy and still manage to throw the created particle with a speed again comparable to that of light?

Electrons in the atom travel close to the speed of light and they can emmit and absorb photons makeing them change energy levels. The photon comeing from them always travel at the speed of light if in a vacuum.

The electron has mass and can eject photons at a higher velocity than it is traveling.

Electrons and positrons can combine to create neutrons. These particles are said to decay at random times in their history with unceairtainty as if they decayed or didn't decay at the same time until they are observed and the wave fuction collaspes. But, I am still trying to figure that one out for myself. Relativity isn't that combatable with QM, so I don't think you will get a real answer.
 
  • #11
John232 said:
Electrons and positrons can combine to create neutrons.

not in my lifetime! :redface:
 
  • #12


tiny-tim said:
not in my lifetime! :redface:

Sorry, I meant protons. LOL.
 
  • #13


Electrons and positron would annhiliate each other into photons.
 
  • #14


nitin_zilch said:
isn't collision also a way of interaction??
Yes. So is your question about how SR handles collisions? In SR collisions are governed by the conservation of the 4-momentum.
 
  • #15


which of the following strong or weak or electromagnetic interaction willl have particle exchange rate high to manifest their effect?
 
  • #16
nitin_zilch said:
which of the following strong or weak or electromagnetic interaction willl have particle exchange rate high to manifest their effect?
EM is fine for that. The effects of the exchange of photons is measurable.
 
  • #17


dalespam

and why's that?...
why not strong or weak?...


also then tell the factor that makes strong interaction as so...
is it so bcoz of exchange of heavy particles??
 
  • #18


dalespam

why not strong or weak?...

is that only the exchange of heavy particles manifest as strong?
 
  • #19


I just said that the effects of photon exchange are measurable, I didn't say that the effects of exchange of W, Z, or gluons were not measurable. The EM force is easier, so let's just stick with that and not complicate things unnecessarily.

Can you ask your question in a very explicit manner using a concrete example of the exchange of a photon? We are now on the second page and still have no idea what you are asking. Try to be very clear.
 
  • #20


ok ...dalespam
i started all this to check the interaction process of a particle when it has undergone enough time dilation,i still doesn't have that answer,i think i need to check the biological process of aging for humans and then will think upon the series of events that could b responsible for that ...
 
  • #21


nitin_zilch said:
ok ...dalespam
i started all this to check the interaction process of a particle when it has undergone enough time dilation,i still doesn't have that answer
Of course you still don't have that answer, we still don't know what the question is. Please be clear and specific, use a concrete example. What do you mean by "check the interaction process", and which particles are you considering, and what do you mean by "enough time dilation"?

Your question is so vague that it is impossible to answer. You must put some effort into communicating clearly.
 
  • #22


dalespam

her's the question that may give me my answer and will clarify u the context......


is there a biological process defining time dilation?if yes what's it
 
  • #23
nitin_zilch said:
is there a biological process defining time dilation?

no of course not :smile:
 
  • #24


nitin_zilch said:
her's the question that may give me my answer and will clarify u the context......

is there a biological process defining time dilation?if yes what's it
How do you think that this clarifies in any way what you mean by "check the interaction process" and "enough time dilation"? This seems entirely unrelated to all of your previous questions.

As tiny-tim mentioned, time dilation is defined in terms of the Lorentz transform, not anything biological. However, all biological processes would be affected by time dilation. This includes heart beats, respiration, diurnal rhythms, healing times, life expectancy, gestation period, reflex times, glomerular filtration rates, etc.
 

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