On 6/12/2025 4:33 PM, Alan Grayson wrote:
On Thursday, June 12, 2025 at 1:56:20 PM UTC-6 Brent Meeker wrote:
...
The problem is you don't even have a proper conception of
"understanding".
*GR has many unexplained postulates, like the physical reason mass
distorts spacetime. *
Yes, but what would count as an explanation for you? Entropic gravity?
https://en.wikipedia.org/wiki/Entropic_gravity
*You're the one who has an improper concept of "understanding". You
don't seem to have a clue of what you don't understand! Consider the
muon. Why does applying the LT cause its half-life to dilate? *
I know that one. It's because when going fast it takes an inertial
spacetime path with more space and less time, as quantified by the
Lorentz transformation. In it's own frame it is decaying at the same
rate as a stationary muon...which is good since otherwise we'd have
absolute motion.
Brent
*It's not even being observed, just thought of as being observed. Yes,
one can say it happens in order to preserve the invariance of light
speed. Is that really enough? You just don't want to go deeper and are
happy with your equations. Sad. AG *
You're like Faraday who conceived of the electric and magnetic
fields as lots of masses and springs. If it was just equations it
wasn't understood. It had to be masses and springs. When you saw
the infalling space model of gravity you thought it provided you
"understanding", but it wouldn't even allow for orbits.
*No.You read worse than a Trumper. I wrote it didn't explain what
happened to space when it reached the center of the gravitating mass,
among other things unmentioned, like why does it flow. AG *
In graduate school, if not earlier, physicists learn to let
equations speak for themselves. Examples are good to develop
intuition. But every example is incomplete. And every made-up
visualization is misleading in some respect. So think about what
counts as "understanding". Knowing the equations and how to
apply them is the real understanding.
Brent
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