18,261 reputation
34374
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location Princeton, NJ
age 25
visits member for 2 years
seen 8 hours ago

I am a graduate student studying astrophysics at Princeton. I received my bachelor's in physics and mathematics from Caltech (2011).


Jul
29
comment calculate force between two magnets
In particular, the policy states, "It's not enough to just show your work and ask where you went wrong. If you just need someone to check your work, you can always seek out a friend, classmate, or teacher." Even if you aren't in school and thus can't easily confer with someone in person, the fact remains we aren't a check-my-work site. As for downvotes, each user has their reasons, but for what it's worth this has far fewer downvotes than a typical "here's my homework, do it for me" question.
Jul
28
comment How do black holes in merging galaxies find each other to merge?
A footnote with some other search terms: This is the final-parsec problem, and indeed many feel the solution is in dynamical friction. Though papers are still published on the topic, so some would say the details aren't 100% worked out.
Jul
28
comment Is there a substance that doesn't reflect OR absorb light from the visible light spectrum?
I challenge you to see a flat piece of glass with an anti-reflective coating ;)
Jul
28
comment Evidence of why the Standard Model is a successful theory of particle physics
$a \neq \alpha$
Jul
26
comment Is it feasible to detect light emitted from planet earth 2,000 years ago by reflection from an object situated 1000 light years away?
Do you have a citation to back up the claim that we have detected our own radio signals? I'm reasonably sure we couldn't detect our own radio signals even 1 ly away with even the most powerful radio telescopes.
Jul
25
comment Calculate loudness of sound: why am I getting contradictory answers?
I'm curious where you got the original 210-213 dB. I can't identify anything in either link that gives that intensity at 75 m.
Jul
24
comment Is it possible to produce images of pair production in home-made cloud chamber?
For the curious, the market rate for 1 $\mu\mathrm{Ci}$ of Co-60 (which seems to be the most one can have without a license, but the NRC's rules are too convoluted for me to be sure what they say) seems to be about \$80.
Jul
23
comment Thoughts on the ice cube from orbit problem
@parceval John's calculations assume an equilibrium of sorts, and deals only with thermodynamics. A large enough meteor will hit the ground long before thermally equilibrating, and (for km-sized objects and above) even before a sound wave can cross from the front of the object to the back, and so kinetics becomes more important.
Jul
23
comment Why do I hear the telephone ring through grandpa’s hearing aid before the actual phone rings?
Many hearing aids link to devices like phones and TVs through e.g. Bluetooth...
Jul
23
comment Open problems in string theory
As with any topic, there is a PhD thesis for you if and only if there is an adviser willing to take you on as a student in that topic. Open questions are irrelevant if no one in your university will mentor you in them, and questions that aren't famous make perfectly for perfectly good research under the right tutelage.
Jul
23
comment How many of the 230 crystallographic groups are realized in nature?
PCC2 (mentioned by akhmeteli as not being observed as of 1999) is not in the dropdown menu. Also "The list box does not contain all possible space groups, but only those represented in the database." Interpret that how you will.
Jul
22
comment Jumping sewer lid - WHY?
Bernoulli might be at work here, but not with respect to airplanes.
Jul
22
comment If wavefunction is just a probability function, how does an electron interfere with itself
Interference can be viewed as otherwise unexpected ripples in the probability distribution, and it it directly caused by the fact that there are underlying complex amplitudes being added together before squaring. If all we had was the probability distribution, there would be no interference.
Jul
22
comment Is topology of universe observable?
There is a real risk of applying a double standard here with regard to the ontological definitions you choose. There is at least one natural definition of "geometry" for which it most certainly can be observed, and there is another definition for which it cannot. The same dichotomy holds for "topology." Would constructing a non-contractible worldsheet count as proving a topological statement about the universe? It depends if you allow one to write the laws of physics in an equivalent (but seldom used) way that makes no reference to standard topological notions.
Jul
18
comment How are the distances to the most distant $\gamma$-ray bursts measured?
@Kyle then retracted, but perhaps the question should give some hint that photo-z's were involved? Maybe with some quote from the article?
Jul
18
comment How are the distances to the most distant $\gamma$-ray bursts measured?
@Kyle but what about the one I linked? Also, if the OP didn't just want GRB's, there's physics.stackexchange.com/questions/70400/… for radio.
Jul
18
comment How are the distances to the most distant $\gamma$-ray bursts measured?
possible duplicate of How is the distance to a $\gamma \mathrm{-ray}$ burst (GRB) measured in just a few days?
Jul
18
comment How has the age of the Universe been derived from the observations made by the Planck mission?
Worth pointing out that, despite the press coverage, nothing Planck did was new - it had all been done a decade earlier, using the exact same technique.
Jul
18
comment Hot water freezing faster than cold water
That's Zhang article is incredibly sketchy "science."
Jul
17
comment Is a “shift in the meaning” of Accuracy and Precision occurring?
lol. Unlike French, English is not dictated by the whims of a committee. Who do the authors of that document think they are?