"Spaceman" wrote in message
. ..

"OG" wrote in message
...
| But you seem to say that in order that you can measure the distance
between
| the lines you have to stop moving relative to the lines.

To physically measure such, yes.

Note that James refuses to define "physically measure"
and explain how it is fundamentally different from any
other type of measurement (hint: there really are no
different kinds).

[snip]

| I think it's now time that we go back to the question I asked in one of my
| original responses:-
| How would (B) measure the separation of the lines whilst they are whipping
| past at .5c ?

Ok,
more gedanken stuff here so bear with it.
If a wheel was placed on the gedanken ground we
created, and it was 1 mile in circumference,
(1 roll per line)
would it not spin at 93,000 rotations per second
if traveling at 0.5c past such lines?

If all measurements are taken in the rest frame
of the lines, then yes, of course.