Re: a relative question


"PD" <TheDraperFamily@xxxxxxxxx> wrote in message
news:1186753498.679355.67560@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: On Aug 10, 8:35 am, curiousee...@xxxxxxxxxxx wrote:
: > > If it were flat out not the case, we would have seen that a long, long
: > > time ago. Particle accelerators from the time of the first cyclotron
: > > over 60 years ago have measured this increase in energy, and it is in
: > > complete agreement with the expression you wrote above. In fact, if it
: > > were not the case, then modern accelerators would not and could not
: > > work at all, since that dependence is built directly into the design.
: >
: > I'm not disputing the experience of the acceleration (well, not much),
: > but the experience of the collision. Before realising the "reply to
: > author" button e-mailed people directly, I asked a couple of
: > respondants whether there is experimental evidence that the energy
: > released in the collision ever exceeds m(of the accelerated
: > object)c^2.
:
: And there most certainly has. I'll give you one simple example. At the
: Large Electron Positron Collider, which has since been decommissioned,
: it was a routine event to take two electrons, each having a rest
: energy of 0.511 MeV, collide them, and produce a Z particle from that
: collision with a rest energy of 91,000 MeV.
:
: >
: > > This is the second place where you have an error. There is no innate
: > > rate of "ability to express energy". For example, if there is a two-
: > > particle collision, there is no slowing of the transfer of momentum
: > > and energy from one particle to the other observed. Your assumption
: > > that there should be, because the "clock" in the moving particle is
: > > slowed down, is erroneous, and in fact it is counter to the principle
: > > of relativity itself.
: >
: > No, my assumption is that during the deceleration the "clock" would be
: > slowed down. We would not notice this as observers but it would (if I
: > were right) show up in very high speed collisions. My assertion is
: > that such a collision will never yield energy beyond the mass of the
: > two colliding objects times c^2.
:
: And high-speed measurements are routinely done at particle accelerator
: collider experiments. Such an effect would have stood out like a giant
: swollen thumb by now, and no such effect has been seen.
:
Right enough, the LHC isn't on line yet.
Landings on Mars are routinely done in ballistics experiments, a man on Mars
would have stood out like a giant swollen thumb by now, and no such effect
has been seen.




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