The River Model of General Relativity
Does space "flow" like a river? There's an analogy in General Relativity positing exactly that, and which, astonishingly enough, conveys the sophistication of Einstein's theory via a few simple intuitions. But how truthful is such a view, and what would it imply about the most infamous of massive objects to inhabit our universe -- that of the black hole? Climb aboard our river-boat and find out! Plus -- Curious Edgar finds himself in more than one vertiginous predicament.
Credit for the thumbnail title goes to this webpage: https://jila.colorado.edu/~ajsh/insid...
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Content:
00:00 - Intro
01:05 - The Set-Up
01:54 - Accelerated Frames & "Flowing" Space
04:24 - Acceleration at the Surface of the Earth
06:10 - Reinterpreting Gravity
07:36 - Riverine Analogies
11:12 - Constructing the River of Space
12:43 - Phenomena on the River
16:05 - A Black Hole is a Waterfall of Space
18:09 - Conclusion
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