The Naked Scientists

The Naked Scientists Forum

Author Topic: The first electrons  (Read 3433 times)

blakestyger

  • Guest
The first electrons
« on: 16/04/2008 19:18:54 »
At the beginning of the Universe, when t was less than one minute, atomic nuclei of H, D, He and some Li were formed - does anybody know when the first electrons appeared and under what conditions?


 

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • Posts: 12656
  • Thanked: 3 times
  • A stitch in time would have confused Einstein.
    • View Profile
The first electrons
« Reply #1 on: 16/04/2008 21:31:59 »
About 1/100th of a second after the Big Bang.
 

Offline syhprum

  • Neilep Level Member
  • ******
  • Posts: 3816
  • Thanked: 19 times
    • View Profile
The first electrons
« Reply #2 on: 17/04/2008 14:06:04 »
a very concise answer doc , would that be when the temperature had dropped to the equivalent of 0.511 Mev
 

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • Posts: 12656
  • Thanked: 3 times
  • A stitch in time would have confused Einstein.
    • View Profile
The first electrons
« Reply #3 on: 17/04/2008 21:21:45 »
100 billion degrees Kelvin
 

Offline Soul Surfer

  • Neilep Level Member
  • ******
  • Posts: 3345
  • keep banging the rocks together
    • View Profile
    • ian kimber's web workspace
The first electrons
« Reply #4 on: 21/04/2008 18:36:31 »
No!  electrons were probably around long before that.  In fact they were probably around long before there were protons and neutrons  ie when it was all quark soup and electrons and neutrinos and their heavier analogues like Muons and Tauons.  Electrons are stable and unchanged up to the highest possible energies achievable. Even string theory suggests that they may be totally fundamental and not composite in any way.
 

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • Posts: 12656
  • Thanked: 3 times
  • A stitch in time would have confused Einstein.
    • View Profile
The first electrons
« Reply #5 on: 22/04/2008 07:55:18 »
I took those figures from a Big Bang timeline on a science website. Having just read it again, I see that I misunderstood what was written. My apologies.

« Last Edit: 22/04/2008 22:17:38 by DoctorBeaver »
 

blakestyger

  • Guest
The first electrons
« Reply #6 on: 22/04/2008 20:58:16 »
Thanks everybody, especially soulsurfer. So they are fundamental fundamental particles then - excellent.
I was trying to find out if they preceded neutrons and protons - and it seems they did.
 

Offline Soul Surfer

  • Neilep Level Member
  • ******
  • Posts: 3345
  • keep banging the rocks together
    • View Profile
    • ian kimber's web workspace
The first electrons
« Reply #7 on: 23/04/2008 00:11:54 »
It's interesting to think that back then in the quark soup period they were effectivley much heavier because they were going so fast that their relativistic mass was very many times their rest mass because of the high temperature
 

The Naked Scientists Forum

The first electrons
« Reply #7 on: 23/04/2008 00:11:54 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums