Parthib Roy's latest activity
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Parthib Roy reacted to Ibix's post in the thread High School A question on the geometry of black holes with
Informative.
Since the thread is reopened I'll drop in something I wrote on proper and comoving distance: Proper distance is the distance measured... -
Parthib Roy replied to the thread High School A question on the geometry of black holes.I would like to second Cerenkov's suggestion here. As another member who finds themselves reading these threads with a mix of...
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Parthib Roy reacted to Ibix's post in the thread High School A question on the geometry of black holes with
Like.
I think your wording is a bit off if you are meaning the same as what we're saying. I don't think it's a good idea to say they see a... -
Parthib Roy reacted to PeterDonis's post in the thread High School A question on the geometry of black holes with Like.
The diagrams in Davis & Lineweaver show the difference. In terms of comoving distance, any two comoving observers are a constant...
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Parthib Roy reacted to PeroK's post in the thread High School A question on the geometry of black holes with Like.
A singularity is where the mathematical model breaks down. The observable universe can't have expanded from a point in a physically...
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Parthib Roy reacted to PeterDonis's post in the thread High School A question on the geometry of black holes with Informative.
Because when we construct a model of the universe using GR, under the assumption that it is dominated by matter and radiation at early...
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Parthib Roy replied to the thread High School A question on the geometry of black holes.well since we are talking about big bang singularities and with the fascinating explanations given by @Ibix and @PeterDonis i would also...
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Parthib Roy replied to the thread High School A question on the geometry of black holes.got it thanks👍
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Parthib Roy reacted to Ibix's post in the thread High School A question on the geometry of black holes with Like.
Like I said, the singularity is the edge of the map. In the case @PAllen is talking about all the matter of the star exits the map at...
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Parthib Roy replied to the thread High School A question on the geometry of black holes.could you elaborate a little more?
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Parthib Roy replied to the thread Why does a fan cool you in a sealed room if it adds heat?.yeah i was a little wrong in my statement abt lowering the general temperature ,yes the general temperature would increase but the...
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Parthib Roy reacted to PeroK's post in the thread High School A question on the geometry of black holes with Like.
It's not like that. A singularity is when a mathematical model breaks down. It's not a physical thing. Once you cross the event horizon...
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Parthib Roy 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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Parthib Roy 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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Parthib Roy reacted to javisot's post in the thread High School A question on the geometry of black holes with Like.
What do you mean by "at there geometric center"? That's indeed a 2D representation and you need to extrapolate it to more dimensions...