On Thu, Jun 12, 2025 at 7:33 PM Alan Grayson <agrayson2...@gmail.com> wrote:
> *> GR has many unexplained postulates,* > *Many? General Relativity only has 3 postulates:1)The speed of light is constant for all observers.2) Gravitational mass and inertial mass are equivalent.* *3) Equations expressing physical laws should say the same thing regardless of what coordinate system is used to describe 4D spacetime, even accelerating or rotating ones. * *Or if you're willing to tolerate a little inaccuracy and wanted to say the same thing more poetically you could say it only has one postulate. "matter tells spacetime how to curve". "Spacetime tells matter how to move" comes from the definition of spacetime. And the definition of "move" is a change in 4D spacetime coordinates. * *And a postulate is not unexplained, it is unproven. A statement that cannot be explained is gibberish, but right or wrong "matter tells spacetime how to curve" is not gibberish. * > *> like the physical reason mass distorts spacetime.* > *And if tomorrow somebody found that X is the physical reason that mass exists then you would immediately ask what is the reason that X exists. As I keep saying there are only two possibilities, an iterated chain of questions either goes on forever or ends in a brute fact. * > *> Consider the muon. Why does applying the LT cause its half-life to > dilate?* > *The same exact reason relative velocity causes ANY clock to slow down, the speed of light is constant for all observers. And time is what a clock measures. * On Thu, Jun 12, 2025 at 3:56 PM Brent Meeker <meekerbr...@gmail.com> wrote: > *You're like Faraday* > *Brent, you can't be talking about Alan Grayson! If somebody told me I was like Michael Faraday I would take that as a huge compliment. But I've read about Michael Faraday and Alan Grayson is no Michael Faraday.* > *You read worse than a Trumper.* > *I'm a little jealous, I thought I was the only one Grayson accused of being a Trumper because of a scientific disagreement. * *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* ez1 -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/everything-list/CAJPayv2-_VE2k5MV9GXQ_7pCwhTRq1rrRhnkDTev3gVDpYYkAw%40mail.gmail.com.
