Quote:
Originally Posted by Archy
Re: "Ever heard of Einstein's principle of equivalence on which GR is founded": Yes I have: the Wikipedia says: "In the physics of relativity, the equivalence principle refers to several related concepts dealing with the equivalence of gravitational and inertial mass, and to Albert Einstein's assertion that the gravitational "force" as experienced locally while standing on a massive body (such as the Earth) is actually the same as the pseudo-force experienced by an observer in a non-inertial (accelerated) frame of reference."
It might be noted that it is apparent from your posts in this thread that you do not agree with Wikipedia that the Earth is a massive body.
Re: "We experience gravity in the gravitational field.
We can also experience the same gravity by being accelerated at g in a gravity free field. A gravity free field is flat space.
Hence we can experience gravity in flat space which contradicts your post."
The last two statements are contradictory. |
A non inertial frame of reference is accelerated in
gravity free space.
The pseudo force is
your gravity.
It simply confirms that the effects of gravity can occur in flat space for the reasons I have already given.
Quote:
Re: "The Earth's field is not strong enough for the effects of space time curving
to be observed." Is incorrect: the GPS system has a correction algorithm to correct for changes in space-time.
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Changes to space-time doesn't make any sense.
Corrections to GPS systems involve the synchronization of Earth clocks and GPS satellite clocks.
GR predicts a clock at a higher gravitational potential (ie a clock on the Earths surface) will run slower than one at a lower potential (satellite clock).
This is an example of gravitational red shift
which has nothing to do with the geometry of space-time. In fact the original concept of gravitational red shift was devised using SR which assumes that space is flat.