On 12/9/2024 3:24 PM, Alan Grayson wrote:
On Monday, December 9, 2024 at 2:01:28 PM UTC-7 Brent Meeker wrote:
>
> Nothing odd about dilation and contraction when you know its cause.
> But what is odd is the fact that each frame sees the result
> differently -- that the car fits in one frame, but not in the
other --
> and you see nothing odd about that, that there's no objective
reality
> despite the symmetry. AG
The facts are events in spacetime. There's an event F at which the
front of the car is even with the exit of the garage and there's an
event R at which the rear of the car is even with the entrance to the
garage. If R is before F we say the car fitted in the garage. If
R is
after F we say the car did not fit. But if F and R are
spacelike, then
there is no fact of the matter about their time order. The time
order
will depend on the state of motion.
Brent
Since the car's length can be assumed to be arbitrarily small from the
pov of the garage, why worry about fitting the car in garage perfectly,
and then appealing to difference in spontaneity to prove no direct
contradiction between the frames? It seems like a foolish effort to
avoid a contradition, when one clearly exists. AG
What's the contradiction?
And it's "simultaneity" not "spontaneity".
Brent
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