Re: Equivalence Principle Question
- From: "Sue..." <suzysewnshow@xxxxxxxxxxxx>
- Date: Fri, 31 Aug 2007 09:42:37 -0700
On Aug 31, 11:15 am, funk420 <funk...@xxxxxxxxx> wrote:
Part one
Two observers are in two perfectly opaque laboratories, let's call
them boxcars with a length l and width w.
One boxcar floats in the middle of perfectly dark and flat
intergalactic space with zero mass density.
The other is in orbit about a large mass (M), also with no mass or
energy density nearby other than the central mass (assume it isn't
radiating).
What's the best way for an unfortunate observer in one of these boxes
to tell whether he is in orbit or not? No peeking out of the box!
Shoot a bullet across the box. If it follows a curved path
then the box is in orbit.
Part two
Did Gravity Probe B give an example of such a measurement?
No... Gravity Pobe B had a *peeker* looking at a star.
Sue...
Thanks -
Inside the boxcars is any apparatus you can dream up to be used as
accelerometer
.
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