MadSci Network: Physics
Query:

Re: revalvity of motion

Area: Physics
Posted By: Shel Randall, System Consultant
Date: Mon Aug 26 19:21:49 1996
Message ID: 839347427.Ph


Lloyd -

You have answered your own question!  The same way Einstein did, I might
add.

You said:
> To say something is moving, it is neccessary to relate it to
> something else.

Einstein said:
"Everything is relative."

Presuming that these two statements are equivalent and true,
then, by definition, it is not possible to define an ABSOLUTELY
stationary object or point of the universe.

The speed of light is measured relative to other things, like,
for example, a laser that produces the light.  The precision of
the measurement is exceedingly high, but alas, in the cosmic
scope of things, will never be absolutely absolute.

Perhaps now is a good time to introduce you to a concept of
precision level we scientific types like to technically refer to
as "good enough".  :)

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