Re: When does a FOR cease to be a FOR?


"Daniel Weston" <daniel009@xxxxxxxxx> wrote in message
news:29512-4338462A-1217@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
|
| I am sure that this is a naive question, but I would like it to be
| clarified in my own mind. Take a laboratory as a FOR. Does movement
| within the lab destroy the lab as a FOR?

If a bright green flying elephant is present, yes. Otherwise no.


| If a scientist changes
| position from one end of the lab to the other, is the scientist in the
| lab's FOR during this travel?


We shall not here discuss the inexactitude which lurks in the concept of
simultaneity of two events at approximately the same place, which can
only be removed by an abstraction.
(footnote 3, http://www.fourmilab.ch/etexts/einstein/specrel/www/ )

A bright green flying elephant is an abstraction.


Does the lab cease to consist of 1 FOR
| upon internal motion?

If the bright green flying elephant moves, yes.

| If motion within the lab destroys the lab and its
| contents

Oh, a bright green flying elephant is like a bull in a China shop,
especially a bull elephant. Everything gets destroyed.

from being in the same FOR, does this mean that a moving
| experiment cannot be done within a single FOR?

It can't, the bright green flying elephant gets in the way.

| Depending on the answer I have some follow up questions.

Oh goody.
Androcles.

.