javisot's latest activity
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Jjavisot reacted to PeterDonis's post in the thread High School The One Electron Universe suggested by Wheeler with
Like.
That's true, but that hypothesis is not the same as Wheeler's "one electron" hypothesis. In quantum field theory--or more precisely... -
Jjavisot reacted to Ibix's post in the thread High School A question on the geometry of black holes with Like.
Yes. Spacelike surfaces are moments in time, so the big bang singularity was not a place - apart from anything else it's in the past of...
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Jjavisot reacted to PeterDonis's post in the thread High School A question on the geometry of black holes with Like.
Yes. The Big Bang singularity is a moment of time that is to the past of every event in the universe.
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Jjavisot reacted to PeterDonis's post in the thread High School A question on the geometry of black holes with Like.
It's worth noting, though, that even though the interior of a black hole is vacuum, the spacetime curvature does increase without bound...
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Jjavisot reacted to Ibix's post in the thread High School A question on the geometry of black holes with Like.
No. If you fell into a black hole the mass of the Sun (and if GR were correct which it probably isn't!) you would reach the singularity...
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Jjavisot reacted to Ibix's post in the thread High School A question on the geometry of black holes with Like.
You can't extend that kind of picture to a black hole interior, unfortunately. Assumptions made during the drawing fail at the event...
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Jjavisot replied to the thread High School A question on the geometry of black holes.What do you mean by "at there geometric center"? That's indeed a 2D representation and you need to extrapolate it to more dimensions...
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Jjavisot reacted to gentzen's post in the thread Graduate How valid is the indivisible interpretation of quantum mechanics? with Like.
If you want to read something recent from Jacob Barandes, I would rather go with Barandes certainly has his reasons why he proposed...
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Jjavisot reacted to Dale's post in the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle? with Like.
Again, there is no single answer. Any author can choose whether they take it as an assumed principle or a theorem proven from other...
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Jjavisot reacted to renormalize's post in the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle? with Like.
Can you define what what you mean by the word "principle"? Or are you asking: "We all know that the Energy is conserved, what I'm...
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Jjavisot replied to the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle?.https://en.wikipedia.org/wiki/Noether%27s_theorem
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Jjavisot reacted to PeroK's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
It isn't. No one has found a way to make a discrete theory work. The continuum is simpler mathematically and thereby the default...
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Jjavisot reacted to PeroK's post in the thread Undergrad What empirical observation supports the axiom of continuous spacetime? with Like.
Because it makes the mathematics easier.
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Jjavisot reacted to PeterDonis's post in the thread Undergrad Hawking radiation may smooth black hole singularities with Like.
For some values of "Hawking radiation", yes. :wink: Physically speaking, "backreaction" isn't something that needs to be "added". It...
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Jjavisot replied to the thread Undergrad Hawking radiation may smooth black hole singularities.The Bardeen black hole also evaporates via Hawking radiation, but whether the process is unitary seems to depend on adding backreaction...