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Le 22/07/2024 à 21:34, "Paul.B.Andersen" a écrit :But "proper speed" is never used in SR because:Den 21.07.2024 23:06, skrev Richard Hachel:Yes.
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Let's look at the LHC again.
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The length of the circuit is L = 27 k, γ = 7460
The real speed of the proton in the lab frame is
v = 0.999999991·c
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The real time measured in the lab frame for the proton to go
around the circuit is
T = L/v ≈ 90 μs
The proper time of a proton to go around the circuit is
τ = T/γ ≈ 12 ns
"proper speed" = L/τ = 6947c
When calculating velocities the distance and time must be measuredThis "speed" is not the speed of a proton or anything else.It is.
Calculate p=mVr and E=mc².sqrt(1+Vr²/c²)In the real word we have p = mvγ E = γmc²
No, that is not what you say.The proton is moving at the speed 0.999999991·c relative to the lab,That what I say.
and the lab is moving at the speed 0.999999991·c relative to the proton.
There is nothing illogical or abnormal there.Here is how you calculate the speed of the lab relative to
No one but you.And you thought that the real speed speed of the proton in the lab frameBut no!
was 6947c and therefore you "tell them [the physicists at CERN] that
the proton rotates 78 million times per second".
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Which is 6933 times the real number, ≈ 11.25 thousand times per second.
We can't say that if a proton spins once, it spins thousands of times, that's stupid.
No one will ever tell you that.
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