On Fri, Dec 02, 2016 at 10:02:49AM +1100, Bruce Kellett wrote:
> On 2/12/2016 9:26 am, Russell Standish wrote:
> >On Thu, Dec 01, 2016 at 04:26:25PM +0100, Bruno Marchal wrote:
> >>I am not sure why he says that Einstein was wrong, as I am not sure
> >>Einstein ever asserted that space-time or gravity was fundamental.
> >>To say that Einstein is wrong looks like a cliché in fashion, today.
> >It's code speak for saying the speed of light is not a constant. It's
> >more a bone to throw to the media to stir up interest, than a real
> >scientific statement.
> >
> >Of course, since the speed of light is just a conversion constant
> >beween our time units and our space units, we are always free to vary
> >the speed of light. It is just a nonlinear reparameterisation of our
> >coordinates. Verlinde's proposal is much, much more than that.
> It is interesting that the speed of light can be regarded as nothing
> more than a conversion constant only if special relativity is
> strictly correct. If  temporal variation in the speed of light is
> discovered, say by finding that the fine structure constant changes
> with time, then we would have to rethink the idea that c is just a
> conversion constant.

Temporal variation of alpha is a completely different beast, as it is
a dimensionless quantity, and far more interesting, of course.



Dr Russell Standish                    Phone 0425 253119 (mobile)
Principal, High Performance Coders
Visiting Senior Research Fellow        hpco...@hpcoders.com.au
Economics, Kingston University         http://www.hpcoders.com.au

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