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0 votes
1 answer
50 views

Limiting the mass of the neutrino for a relativistic case

I came across a question that states What mass would a neutrino need to still be relativistic today (T = 2.37K) ? So for a particle to be relativistic we need $pc \gg mc^2$ Well Neutrino was ...
seVenVo1d's user avatar
  • 3,122
3 votes
1 answer
234 views

Why are there no more galaxies moving as relativistic speeds?

Introductory note: I am not discussing galaxies that are going away from us or that are at the border of the universe. If there are no preferred frames of reference, no galaxy or matter ensemble can ...
Mauricio's user avatar
  • 5,568
-2 votes
1 answer
376 views

Do we have any evidence of slower-than-light neutrinos? [duplicate]

I'm writing a piece on the electron neutrino. There's plenty of excellent material out there, but I'm struggling to find anything definitive about their speed. There is for example evidence from ...
John Duffield's user avatar