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location Princeton, NJ
age 25
visits member for 2 years, 4 months
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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.


Jul
23
reviewed Approve laser pointer class III and potential eye damage
Jul
23
reviewed Leave Open Dielectric with polar molecules
Jul
23
reviewed Leave Open Time constant of ice melt
Jul
23
reviewed Approve Decibel equation, dyne or Watt
Jul
23
comment How would the solar system change if Earth was to just disappear?
Pedantic point for future reference: In the best theory of gravity we have, one cannot just instantly alter mass/energy/whatever like that; if certain things are discontinuous, or if certain other things are not conserved, the theory is internally inconsistent and loses its predictive power. That said, I think this question is fair to ask, since it is phrased implicitly with Newtonian gravity in mind, and indeed thought experiments like this are exactly what Newton and company engaged in all day long.
Jul
23
answered Rest Mass, Where is it Stored?
Jul
23
reviewed Close Why aren't superconductors shiny?
Jul
23
revised Is it possible to build a mechanical version of the basic logic gates AND, OR, XOR and NOT?
comments are ephemeral; good answers are forever
Jul
23
awarded  Proofreader
Jul
23
reviewed Approve Back-action noise vs shot noise
Jul
23
comment Is it possible to build a mechanical version of the basic logic gates AND, OR, XOR and NOT?
You may want to have a look at the wiki on functional completeness - it would be sufficient to construct any functionally complete set, which could be as simple as AND and NOT or even just NAND.
Jul
23
comment Relativistic corrections to classical physics formulae
Are you looking for an algorithm for classical $\to$ relativistic conversions of arbitrary equations? Because such a thing doesn't generally exist...
Jul
22
comment Why do clouds form in lumps?
For readers desiring further info, this instability is known as the Rayleigh–Taylor instability. Other instabilities can also play a role, for instance the Kelvin–Helmholtz instability as seen in this picture.
Jul
22
comment Making pink noise (1/f) using list of frequencies
General piece of advice: It's usually worth separating out concept/algorithm from implementation in your mind. This post discusses Fourier transforms (concept) of discrete data (DFT, a class of algorithms) that you want to be done fast (FFT, a specific algorithm) in the language of your personal choice (Matlab). The conceptual issues should not care what algorithm is in play, and certainly shouldn't care if you are coding Matlab vs. an abacus-based Turing machine - in fact, getting bogged down in implementation details often obscures the concept.
Jul
22
comment Why does positronium decay into 2 photons more often than into 3 photons?
What source says the 2-photon decay is more common? In astrophysical studies of the ISM, it is well known that 25% of Ps decays via the 511 keV line rather than the 3$\gamma$ continuum. Deviations from this are due to instances where Ps did not form from nice radiative recombination $e^+ + e^- \to \mathrm{Ps} + \gamma$ of slow-moving leptons, or from cases where a third body was involved in the decay somehow.
Jul
22
reviewed Edit Relationship between irradiance and radiance
Jul
22
revised Relationship between irradiance and radiance
improved formatting and retagged
Jul
22
reviewed Approve Is a single particle transition allowed between two superconductors having Majorana modes?
Jul
22
reviewed Edit What is heat and how does it effect an atom?
Jul
22
revised What is heat and how does it effect an atom?
added tags; grammar fix