101,138 reputation
7130278
bio website motls.blogspot.com
location Czech Republic
age 40
visits member for 3 years, 7 months
seen 3 hours ago

Hi, I am a string theorist and a publicist.


Aug
11
answered The Equation of State for a Degenerate Fermi gas
Aug
11
comment How to differentiate between rotating frame and linearly accelerating frame?
I can only think about thinking outside the box, like sending a light ray to a distant mirror and seeing that it returns back from the same side only after the multiplicity of the periodicity, or see some bending or something. Of course, the very local difference is very small.
Aug
11
comment How to differentiate between rotating frame and linearly accelerating frame?
Haha, just to be sure, I didn't mean to accuse you of anything. In the same way, it may have been me who used a time machine and plagiarized you. ;-)
Aug
11
comment How to differentiate between rotating frame and linearly accelerating frame?
LOL, if your answer is independent, that's quite a degree of agreement, even in the way how we split the methods.
Aug
11
answered How to differentiate between rotating frame and linearly accelerating frame?
Aug
11
comment Didn't we mess up with the temperature?
Dear @Godparticle, as PlasmaHH said, the wiggling motion of an atom's center of mass completely stops at $T=0$.
Aug
11
comment At what speed will objects hit a singularity?
It's a Penrose diagram, the most standard one for a real black hole that gets formed. They're showing the time-and-radial part of the geometry in some coordinates $(r_P,t_P)$ where $ds^2 = K(r_P,t_P)(-dt_P^2+dr_P^2)$ so that null rays are always at 45 degrees, and this diagram is all you need for this question.
Aug
10
answered Didn't we mess up with the temperature?
Aug
10
comment Why is it more convenient to consider space or time as a continuum?
It's the 2nd paragraph and the first half of the 3rd paragraph.
Aug
10
answered The equivalence of two worlds related by T-duality
Aug
10
answered Magnet substitution
Aug
10
comment Why is it more convenient to consider space or time as a continuum?
Dear Bobie, yes, I can, but the proof is included in this very answer, too. It is really a trivial thing. Competent physicists aren't really writing many papers about this pet idea of some laymen ("discrete time") because the right answer is so obvious.
Aug
10
comment Expansion of the Universe, will light from some galaxies never reach us?
Did you misspell UDFy-38135539 as Methuselah? Quite a typo! ;-) Otherwise we seem to agree, don't we?
Aug
10
comment Expansion of the Universe, will light from some galaxies never reach us?
@benrg, oops, thanks for the fix.
Aug
10
comment Expansion of the Universe, will light from some galaxies never reach us?
@Bobie, apologies, it's surely not clear. Demonstrably getting light from a star is a special type of detection, and we are both getting light from and detecting the Methuselah star, so your comments contradict one another. It's just 190 light years away from us - why do you talk about it at all? Its cosmological behavior with respect to us is as unmysterious as the Sun's.
Aug
10
comment Rational ratio of frequencies leads to isolating integral of motion
If $x$ is multiply-valued, but with a finite number of values, then there is always a function of $x$ that is single-valued. For example, $t^{1/n}$ i.e. $n$-th root of a complex $t$ is multiple-valued with $n$ values and its $n$-th power is single-valued.
Aug
9
revised Rational ratio of frequencies leads to isolating integral of motion
added 431 characters in body
Aug
9
revised Rational ratio of frequencies leads to isolating integral of motion
added 479 characters in body
Aug
9
answered Rational ratio of frequencies leads to isolating integral of motion
Aug
9
comment How can it be that the sun emits more than a black body?
Dear Kyle, I removed my rating because it seems plausible now to me that this does explain it, and yours is a complete right answer. I am not sure.