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location Princeton, NJ
age 25
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I am a graduate student studying astrophysics at Princeton. I received my bachelor's in physics and mathematics from Caltech (2011).

My primary interest is in general relativistic magnetohydrodynamics simulations of black hole accretion.


Feb
28
comment Best Sets of Physics Lecture Notes and Articles
Repeat after me: THIS IS NOT QUORA
Feb
28
comment Silicon-based life
Brought up long ago on meta: meta.physics.stackexchange.com/questions/2804/…; my own opinion is that this is hypothetical biology, not astrobiology (the latter being about how life as we know it can exist in specific extraterrestrial environments).
Feb
28
comment twin paradox inferring cosmic speed limit
Re: the first sentence: "Einstein considered this to be a natural consequence of special relativity, not a paradox as some suggested." (Wikipedia) That is, special relativity implies the correct interpretation of the "paradox," not the other way around.
Feb
27
comment Can we solve California's drought crisis by pointing parabolic mirrors at the ocean?
Is there any reason this should be more efficient than, say, tried-and-true desalination plants? I'm reasonably certain most of California's utilities (and transportation) shortcomings are the result of human ineptitude more than location.
Feb
26
comment Maximum permissible speed while going down a ramp
@Awesome The positive -> negative fix has been made; apologies John if we inadvertently broke your post.
Feb
26
comment How fast is the Earth-Sun distance changing
Yes! Thank you! I feared no one would ever post an answer. Also, welcome to the site!
Feb
25
comment why does the CMB change so slowly
Note that at $z$ of 1000, 1 light year is a few milliarcseconds across.
Feb
24
comment Sun's Right Ascension appears to be wrong in my Stellarium
This would be great if you could give a sentence or two explaining how the Sun's RA varies over the course of the year.
Feb
24
comment How far would I have to go to see a fully rounded Earth?
@Johannes is explaining what Neil deGrasse Tyson claimed without proof: twitter.com/neiltyson/status/431554750119550976
Feb
24
comment Maximum Weight Sustained by wire / Breaking limit of wire
Isn't this a repost of physics.stackexchange.com/questions/99738/… and physics.stackexchange.com/questions/99973/…?
Feb
24
comment Why does the bathroom become hot after a bath?
Other facts that might be relevant: Where does the water come from (cistern on the roof, or underground pipes)? What time of day does this happen? Is the area outside the bathroom de-humidified in some way? How small is the bathroom, and how long is the person in there, and what kind of lighting does it have?
Feb
24
comment What are functions of a complex variable used for in physics?
Just found this very closely related question: physics.stackexchange.com/q/89072
Feb
23
comment Is there any time-dependent hydrogen atom Schrödinger equation, solvable analytically?
What do you mean by "analytically"? You probably don't mean the math definition, which is that the function converges to its Taylor series. If you mean "involving simple functions" the you should know there's no qualitative difference between numerical integration and special functions. In fact many common special functions are evaluated by your computer via the differential equation they satisfy.
Feb
23
comment Relativistic Doppler effect on gamma rays
If you understand the answer you should write it as a proper answer rather than leave it as an addendum to the question. No need to show all the details either - just the concepts will do.
Feb
23
comment Difference between horizon and flatness problems & how inflation solves flatness (w/out math)
I'd argue that flatness is only particularly meaningful if there is some scale larger than which everything is uniform (as is the case in our universe). As for how inflation achieves this: You can treat the curvature term in the equations exactly the same as another substance (matter, radiation, dark energy, and curvature simply have different scalings with time), and going through the math you see the relative contribution of the curvature term compared to the others goes to 0.
Feb
23
comment Shortcut to find $\hat{p}^2$ expectation value
This is a bit broad. Certainly there's no general way to just ignore the action of taking an expectation. On the other hand, anything you might be asked to compute for a harmonic oscillator is easy and shouldn't require integrals.
Feb
23
comment Humour: Noble Gases, Music, Feynman diagrams
This question is not about physics.
Feb
22
comment Gravitational compression in the atmosphere
Are you asking if the air near the surface is kept warm by gravity? Because virial heating from gravity is a one-time thing - once the contraction stops, no further heating occurs.
Feb
22
comment Does strong magnetic field cause time dilation?
Note that people who like to play with Maxwell's equations with a magnetic monopole term inserted will tell you that magnetic monopoles have the exact same effect on this metric (in CGS-like units, of course) - they add a $Q_\mathrm{mag}^2/r^2$ term.
Feb
22
comment Expectation of momentum in the bound state
@user26143 Why not turn that into an answer?