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Physics, Astronomy & Cosmology / Re: Do we need acceleration to define the concept of mass?
« on: 01/06/2012 16:23:51 »
The world line only points forward. The Earth at any instant is about to enter the next instant of time, not the last.
Actually, I don't believe there is any proof that time is irreversible.
Is this theory of "time acceleration" your theory, or is it supported by some testable proof?
Nor do I. I believe the arrow of time is double ended but entropy ensures that we only experience the one end of that arrow. Perhaps in an antimatter universe the arrow points in the opposite direction relative to our universe.
Einstein said that gravity and acceleration are equivalent.
An accelerometer on the Earths surface will register about 1g of acceleration.
The Earth travels through space-time. That's EQUIVALENT to space-time traveling through (or over) the Earth. Time is more dilated closer to the Earths surface than in space. That's been proven by comparing two synchronized atomic clocks. One on the Earths surface and one in orbit. So space-time dilates as it reaches the Earth. That's EQUIVALENT to the Earth accelerating in space-time.
Is it my theory? I don't think so, "I personally believe" it was what Einstein meant when he said gravity and acceleration are equivalent.
Is it supported by testable proof. Yes, the accelerometer and time dilation measurements as mentioned. The accelerometer shows that the Earth is accelerating in space-time. The Earths diameter is not getting any larger as it accelerates therefore it cannot be accelerating in the three dimensions of space, it can only accelerate in the time dimension of space-time. The difference in clock times shows that time is relative and passes more slowly near to the surface of the Earth as predicted by GR.
If we put an atomic clock on a rocket and send it into space. The clock will not only accelerate in the space aspect of space-time but in the time aspect of space-time. (As a second becomes progressively shorter[in comparison to a second on the Earth], the ship covers the same distance in less time from the occupants perspective.) The Earth essentially does the same but just in the time aspect of space-time. Again it is a local effect.
If this isn't the explanation of what Einstein meant when he said that gravity and acceleration are equivalent then what other explanation is there?