1,647 reputation
516
bio website math.berkeley.edu/~cgerig
location UC Berkeley
age 25
visits member for 2 years, 8 months
seen 4 hours ago

Undergrad: Allen Hatcher's recommendation got me accepted into Cornell (I learned Algebraic Topology through his book in high school, along with some email correspondences). But I majored in Engineering Physics, and did experimental research on gravity. Luckily, Ken Brown took me under his wing and provided weekly meetings to understand Group Cohomology.

Grad: I started my PhD in experimental atomic physics at Berkeley, but quit to do math. I am now a student of Michael Hutchings, wooo!


2d
comment what is the composition of magnetic field?
Do you know what the "composition" of the electric field is? If so, explain it, and that'll start letting us know where your confusion lies (because right now, your question makes almost no sense).
Jul
18
answered Basis in quantum mechanics
Jun
22
answered Special relativity and imaginary coefficient of the time coordinate
Apr
13
comment Simple & intuitive explanation of superfluidity?
physics.stackexchange.com/q/76578
Apr
1
awarded  Nice Answer
Mar
5
comment Intuition behind Faraday's Law?
@Danu: False, I did answer the question. You can't keep asking "why", because it'll go ad infinitum. The explanation for a changing magnetic field inducing an electric field will take us far astray from the intended question here! Why does an electric field push electrons? Why does an electric field ever exist? Why does the electron stay in the wire?
Mar
4
answered Intuition behind Faraday's Law?
Feb
22
answered Propulsion force
Feb
22
answered Lagrangian formalism and Contact Bundles
Feb
12
comment What is the physical meaning of the “decay rate” in Fermis golden rule?
google "fermi golden rule and spontaneous emission", this is standard stuff in the literature
Feb
12
comment What is the physical meaning of the “decay rate” in Fermis golden rule?
Spontaneous emission.
Jan
14
comment Electromagnetism Permittivity simple question
The energy density stored in a field distribution is $\frac{1}{2}\epsilon|E|^2$. So fixing $|E|$, you get your result.
Dec
27
comment Quantising the Electromagnetic Field in QED
Have you not googled / checked the main literature? It is 100% in all good QED books
Nov
14
awarded  Yearling
Sep
19
comment Magnetic field of solenoid in cone shape
Study and analyze them? Isn't that what these pictures did? You take the Biot-Savart law and "plug-n-chug" (via computer) and BAM the field lines "flow around" as follows in the pictures.
Sep
13
comment Showing Wien's Displacement Law from Wien's Law
@EmilioPisanty you're completely missing the point, we're doing math to solve an equation, nothing more.
Sep
13
comment Showing Wien's Displacement Law from Wien's Law
I don't care about dimensions, we're talking about showing everything up to constants
Sep
13
comment Showing Wien's Displacement Law from Wien's Law
You said nothing more than I said
Sep
13
comment Showing Wien's Displacement Law from Wien's Law
Sorry you're right I was mixing up different problems; yes we should note that $f(z) = \frac{1}{e^{1/z}-1}$ here (up to constants). Now you can plug-n-chug.
Sep
13
comment Showing Wien's Displacement Law from Wien's Law
Ah you are close, now make the next step! When is $z=5f(z)/f'(z)$ satisfied?