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seen Feb 22 '13 at 11:08

May
1
awarded  Notable Question
Aug
29
awarded  Popular Question
Feb
20
accepted Technical detail in the solution of the hydrogen atom
Feb
20
comment Technical detail in the solution of the hydrogen atom
Oh, thanks, I managed to solve the rest of the exercise after reading your comment!
Feb
16
awarded  Editor
Feb
16
comment Technical detail in the solution of the hydrogen atom
It's supposed to mean "the function that maps $\mathbf r$ to $\frac{1}{r}$" but I thought the exercise was being too pedantic with the notation so I edited the original post to remove it and make it clearer.
Feb
16
revised Technical detail in the solution of the hydrogen atom
deleted 7 characters in body
Feb
16
accepted What is a photon's speed inside a dieletric?
Feb
16
asked Technical detail in the solution of the hydrogen atom
Feb
16
comment What is a photon's speed inside a dieletric?
But from what I understand, an EM wave is a collection of zillions of "coherent" photons, which people generally explain to mean they are all "synched" (I'm not sure this is correct?). When a photon is absorbed by an atom, wouldn't it be later re-emitted at a random direction? And if all photons are being re-emitted at random directions, wouldn't this break the coherence and destroy the EM wave?
Feb
13
comment What is a photon's speed inside a dieletric?
@Qmechanic The top answer to that question simply says that the apparent speed of light is lower due to nebulous "interactions [of the photons] with the atoms of the materials". "Interactions" can be anything. Are we talking about collisions like in the Drude model? Or do the photons get absorbed, then re-irradiated? Or something else altogether?
Feb
13
asked What is a photon's speed inside a dieletric?
Feb
1
awarded  Scholar
Feb
1
accepted Amount of thermal energy in the Earth?
Jan
23
comment Amount of thermal energy in the Earth?
@joshphysics I thought about that, but I don't know how to calculate the mass of the mantle, outer core and inner core. I could use a state equation (we do know the volume, temperature and pressure) but I have zero idea what state equation to use for molten stuff under huge pressures and temperatures.
Jan
22
asked Amount of thermal energy in the Earth?
Jan
8
awarded  Student
Jan
8
asked How to construct the Hamiltonian matrix?