$ Typo-corrected *ACCELERATiON* Frame-of-Reference (..thanks Dirk):
ACCELERATiON = DiRECTiON, or (Velocity-MAGNiTUDE) / DURATiON, change.
o o o o
o o o vector
o o o PROjECTiON
A - - - VELOCiTY vector - - B - - - - - - C
o o o
o o o
o o ..ANY actual PATH o

GUESS *SPEED* is CLEARLY (..ANY actual PATH) / DURATiON.!!
VELOCiTY = (Any measured or imagined VECTOR) / DURATiON.!!
CLEARLY the POSiTiON B is an ARBiTRARY point on the PATH.!!
Any *OTHER two POiNTs* on the *SAME PATH* is a *DiFFERENT* VECTOR.!!

$ Has the FAT lady sung Brian's song.?!!
NO, Dirk. YOU should've HEARD Premier Brian Tobin, TALKiNG.!! WOW.!!
WHAT a ONE-WAY communicator.!! How he STRESSED WORDs, in emphasis.!!

EVERY politician LOVEs to have PROPER emphasis on PRONOUNCED text.!!

You will read MY posts, as if SPEAKiNG, loud & CLEAR, with THRUST.!!
brian a m stuckless

tadchem wrote: David R Tribble wrote: brian a m stuckless wrote:
No.!! No no no.!! DP DooOP.!!
1. "A clock and a ruler are two different things" ..in REAL
life.!! but A clock and a ruler are BOTH objective POiNTmass
things, in GR.

A GR radius r = v^2 / g = v_escape^2 / 2*(n - 1)*g, from
a POiNT A, ON a WORLD-line in SPACE-time, is COMPLETELY
(GR's T_uv CANNOT BE mathematically RELATED to matter,
in any way).!!

PROFOUNDLY, G_uv NO matter ..means NO SPACE-time-curvature
in GR.!!

2. "The measurement of the time of two instants of a clock" ..here
in YOUR example, is Momentum-VELOCiTY *DURATiON* ..a time-duration.

3. You CANNOT know MEASURED CLOCK-POSiTiON A, within PLANCK-length.
$$ DoooOP DOooOP De dooOP De dooOP De dooOP De dooOP De dooOP De.!!

Show: 1986 VELOCiTY c or the SPEED c "as-MEASURED Least-Squares".!!

CALL.!! CALL iMMEDiATELY.!! iMMEDiATELY.!! ..if you happen to "fix"
any HUP, UP, or GR POiNT A closer than a PLANCK length, lp ..duh.!!

A. HUP, UP or GR Tivity POSiTiON A PLANCK UNcertainty
[ i CANNOT locate POSiTiON A ..to within (+) or (-) lp / 2. ]
[ i CANNOT measure POSiTiON A closer than lp = hbar / Mp*c. ]
[ This applies iNHERENTLY to "EXACT position of ANY CLOCK." ]
[ This applies iNHERENTLY to "EXACT position of ANY RULER." ]
[ This applies iNHERENTLY for "EXACT position of ANY BALL." ]
*You CANNOT ((focus)) POSiTiON A closer than PLANCK LENGTH.!!

THEREfore, Heisenberg's UN-necessary UNcertainty's REDUNDANT.

B. Heisenberg's UNnecessary UNcertainty Principle
[ HEiSENBERG UNcertainty's ALL about HOW dimwits ((focus)). ]
[i CANNOT ((focus)) on BOTH ENDs of VELOCiTY vector AT ONCE.]

Heisenberg was NOT WRONG ..just because he GOT CAUGHT too OFTEN,
"Trying to ((focus)) on BOTH ENDs of VELOCiTY vectors, at once!"
brian a m stuckless

Bilge wrote: I was wondering if anybody could help me, --

| PD wrote: 1. A clock and a ruler are two different things.

| wrote:
| 2. You assumed that the leading edge of the light ray will return
| to the source location. BTW this assumption violates the UP. Why?
| Because it would mean that you would knoe the velocity and the
| location of the light ray simultaneously.
About MiRROR-delay Velocity-*DiRECTiON-change* (i.e. acceleration).?!!
Planck out of bag.!! HUP UP Tivity POSiTiON A PLANCK UNcertainty.
Acceleration = direction, or (velocity-magnitude) / duration, change.