So being that black holes are the most information-dense systems in the universe, does that mean they have maximum entropy or minimum entropy?
Black Hole Entropy
Justin Diaz
Kayden Morris
>Entropy
No such thing.
Isaac Stewart
:O
Isaiah Morris
...
Blake Ortiz
t. Sophomore
Bentley Powell
(OP)
Any non-BH object with the same mass as a particular BH must have a lower entropy than the BH.
Entropy is sort of a measure of "what you don't know." An ordered deck of cards can be described in a few words. There's not much you don't know.
A shuffled deck takes a lot more verbiage to completely describe. There's a great deal you don't know.
You don't know ANYTHING about what's inside an event horizon. All properties but mass, and spin, and charge disappear at the boundary. You can't know less than zero about something -- so BHs have the maximum possible entropies.
Isaiah Murphy
Thanks, cobber. That's a good explanation.
Wyatt Myers
So do black holes evaporating make entropy go up?
I don't have a brainlet macro for my post, just use this one.
Justin Lopez
Go down I mean.
Austin James
Low entropy, they evaporate over time.
Leo Long
That's an interesting point.
Does the evaporation via Hawking radiation lower the entropy?
Cooper Ortiz
>low entropy
>high entropy
It is the exact same thing, that fucking brainlet.
Andrew Rogers
The jars looks different to me.
Parker Flores
...
Aaron Ross
* Munches popcorn, watches posers 'discuss' things they don't understand or know anything about, including even what the words mean. *
Christian Moore
count it yourself
Robert Hernandez
Most of us are asking questions, one guy gave an answer, and everyone else is just saying "Haha you don't know but I do, I swear"
So sure, do whatever buddy.
Aaron Baker
>Does the evaporation via Hawking radiation lower the entropy?
Thomas Anderson
>Entropy is sort of a measure of "what you don't know."
Dominic Carter
Stop begging the question, OP.
grammarist.com/rhetoric/begging-the-question-fallacy/
>Begging the question, sometimes known by its Latin name petitio principii (meaning assuming the initial point), is a logical fallacy in which the writer or speaker assumes the statement under examination to be true. In other words, begging the question involves using a premise to support itself.
A black hole is not "infomation-dense" any more than it has "rotational-velocidensity". That's just a made up word. In terms infomation crammed into a small space, a typical hardrive with a compression algorithm has more information space in it than any celestical object.
Ian Cox
Could you please go back to your nursery?
Christopher Murphy
Why dont you fuck off you chad shit.
Dominic Smith
Isn't entropy more of a measure of "happenedness"; where a black hole is maximally static?
Bentley Scott
I seriously dont get how you get from log of multiplicity of a system to a fucking black hole. Given that we dont know the multiplicity and entropy has to be maximized to conserve energy I dont see a way to reasonably decide based on basic thermodynamics and thats where
en.m.wikipedia.org
comes into picture and apparently entropy of black hole is proportional to its surface area
Adam Young
I'm non-physics brainlet here
can anyone explain me the whole "information and black holes" schtick?
I think of "information" as an abstract, non-physical concept, how does gravity/mass affect it?
Hudson Perez
>entrophy
kys my man
Jeremiah Turner
...
Angel Flores
Cooper Gomez
A black hole's radius is the length of its singularity to the event horizon.
You just havent comprehended the concept clearly.
Alexander Lewis
Maximum entropy, see: en.wikipedia.org
Austin Clark
Henry Collins
Look around in your basement: Thát's entropy, neckbeard.
Cameron Richardson
>entropy of black hole is proportional to its surface area
>surface area decreases
>entropy decreases
Woops
Angel Walker
Everyone in here who has to use analogies or quotation marks to describe entropy has no qualifications to talk about it at all and should (re)read fundamental literature.
Ethan Murphy
That isn't entropy. Simple mixing or disorder is not entropy. It is a mathmatical state regarding the distribution of energy into stable states the represent a local minima.
Ian Nelson
>Entropy is sort of a measure of "what you don't know."
no it isn't. Entropy describes the energy difference between the current state and the theoretical "stable ground state" where no further work can be extracted from the system.
Blake Jenkins
Nope, the energy of a black hole is proportional to its mass and volume. The entropic state of a black hole is a maximum entropy. You cannot extract work from a system that only includes a single black hole.
Black holes can lose energy through Hawking radiation, but if you put a radiation mirrior around a black hole it would be steady state forever.
Bentley Price
just explain it thoroughly and then leave, don't even look at the responses. If you're actually a grad student or have a physics PhD then you should be able to do so easily.
Jacob Miller
This. Entropy is a spook.
Hudson Adams
A curious question.
Can black holes with different masses have different volumes?
And which is the mass and volume relationship?
What about the no hair theorem.
Asher Allen
W H A T I S G I B B S E N E R G Y ? ? ?
Nathan Martin
I'd say you could replace entropy with density, and make them limits.
Carson Cooper
>Does the evaporation via Hawking radiation lower the entropy?
It lowers the entropy of the universe. The BH has a maximum entropy density; it is a state of maximum entropy for a given volume (the volume inside the event horizon). However, the universe is much larger, and is not in a maximum-entropy-density state.
The evaporation increases total entropy by putting particles into states outside the event horizon. The remaining mass of the black hole is lower, so its event horizon shrinks. The black hole's total entropy thus decreases, but the universe's entropy increases by more than enough to compensate. It's essentially the same idea as how a blackbody such as a star cools by radiation: its entropy drops but the total entropy of the system rises because of the entropy in the radiation.
Ian Miller
>It lowers the entropy of the universe.
Sorry: meant to say it *increases* the entropy of the universe.
Lucas Harris
>The black hole's total entropy thus decreases, but the universe's entropy increases by more than enough to compensate
That's interesting, thank you.
Oliver Richardson
The other guy said a blackhole was max entropy though.
Charles Young
>proportional to it's mass and volume
So the wiki page is wrong then? I don't think proportionality to mass and volume is correct. At best, It's square of the mass of black hole.