Re: When one is fully informed, he knows time is a spatial dimension.

=?UTF-8?Q?Jeff=E2=98=A0Relf?= <Jeff_Relf@xxxxxxxxx> wrote in
news:Jeff_Relf_2008_Jan_15__9_31_AX@xxxxxxxxx:

Imagine two indentical clocks, one on the surface of the moon,
and the other on the surface of the earth.

Now imagine a lunar astronaut
talking for 9 seconds ( according to his clock ),
transmitting it to the surface of the earth.

According to the clock on earth, it took less than 9 seconds;
i.e. the signal was blue-shifted as it fell into the gravity well,
and everything the lunar astronaut does is sped up, according to us.

Because time is truly a length and
the gravity of the earth-moon system is so predictable,
it's possible to model it as a ( 4-D ) hyper-volume.

This hyper-volume is the gravity field that General Relativity models.
Note... the hyper-volume is motionless, static;
when one is fully informed, he knows time is a spatial dimension.

Sure, if you consider x=ict to be space. Mathematically, time can be
manipulated as a spatial dimansion, but there's more to physics than
mathematics. There's physical intuition also, and you're not a physicist
until you can mesh the two. In practice, you can walk around the room, but
you can't walk around time.

To be fully informed, you have to know what you just said *and* what I just
said.
.

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