Reputation
4,691
Next privilege 5,000 Rep.
Approve tag wiki edits
Badges
15 44
Newest
 Yearling
Impact
~258k people reached

Jan
20
accepted Neutrino power plant
Jan
10
awarded  Yearling
Jan
6
comment Do all massive bodies emit Hawking radiation?
It seems you did not read the question and comments to other answers. Your stand that "no horizon=no radiation" has been already addressed by a conjecture that the horizon can emerge virtually.
Jan
1
awarded  Popular Question
Nov
21
comment Will entropy continue to increase even if the universe begins to contract?
@ACuriousMind all new theories are usually tested against holographic principle and if they contradict it, the theories are usually discarded.
Nov
21
answered Will entropy continue to increase even if the universe begins to contract?
Nov
11
awarded  Good Answer
Nov
3
awarded  Notable Question
Oct
12
comment If the expansion of the Universe accelerates, why its horizon does not shrink?
@Asher Holographic principle usually assumes that the total entropy of the universe is equal to the area of its boundary. Since entropy of universe grows, the horizon area also should grow. For instance, this answer by Ron Maimon claims the entropy of the universe is equal to the area of the cosmological horizon in Planck units: physics.stackexchange.com/a/36121/1186
Oct
11
asked If the expansion of the Universe accelerates, why its horizon does not shrink?
Oct
11
awarded  Notable Question
Oct
10
accepted Is pure water electrically conductive?
Oct
10
comment Is pure water electrically conductive?
Is it good or bad compared to other materials? What about water in isolation from CO2?
Oct
10
comment Is pure water electrically conductive?
What is this conductivity compared to other materials?
Oct
10
asked Is pure water electrically conductive?
Sep
30
comment Possible paradox with black holes and time dilation
An interesting interpretation would be that 1) Yes, Alice is frozen on the surface for infinite time, yet 2) another Alice inside the black hole that was sticked to its surface from infinite past (we assume eternal Schwartzshield solution) unsticks from the surface and falls to the singularity. Something like this.
Sep
30
comment Is the Schwarzschild black hole unphysical?
@Ben Crowell the horizon is null.
Sep
19
comment Possible paradox with black holes and time dilation
Gravitational field cannot delay photons. If you see something, it exists at the time you see it or at least existed short time before, only the time it takes for light to reach you (and its speed is constant). If you see the falling observer to stick forever, this means he sticked forever indeed
Sep
17
comment Can black holes form in a finite amount of time?
@Timaeus this diagram shows all these regions. From r=0 to the horizon and above. And time frame from before BH forms to its disappearance.
Sep
17
comment Can black holes form in a finite amount of time?
@Timaeus light travels along the 45 degree line so according this diagram all Hawking radiation travels along the horizon tll the final burst.