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bio website marty-green.blogspot.com
location Canada
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Dec
10
comment How does a Wavefunction collapse?
Anna, downvoting my answer doesn't mean that you're right and I'm wrong.
Dec
9
revised Are these two quantum systems distinguishable?
added 266 characters in body
Dec
9
comment How does a Wavefunction collapse?
The density matrix is related but it's not exactly my territory. I would refer you to this interesting discussion where the people who understand density matrices show that you cannot distinguish between a system where 50% of the atoms are in an excited state versus a system where all the atoms are in a 50-50 superposition of states: physics.stackexchange.com/questions/8049/…
Dec
9
answered How does a Wavefunction collapse?
Dec
9
comment How does the hydrogen atom know which frequencies it can emit photons at?
@Lalinsky good answer. You are the only one who is remotely correct on this question. The other answers are all such nonsense.
Dec
8
revised Simple real-life examples of Fermi's golden rule?
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Dec
8
comment Simple real-life examples of Fermi's golden rule?
@JamalS Thanks for doing my latex! I don't know how I'm supposed to be smart enough to do quantum mechanics if I'm too dumb to do latex.
Dec
8
answered Simple real-life examples of Fermi's golden rule?
Dec
8
revised How far back can you trace a photon?
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Dec
7
comment How far back can you trace a photon?
Oh come on now. Does your potassium atom make an audible click when it absorbs a photon from the distant star?
Dec
7
comment How far back can you trace a photon?
Then your argument is with Richard Feynmann, not me. I more or less quoted what he calls "Proposition A" (Vol. 3, chapter 1-5 in the Feynmann Lectures)...the very proposition which he concludes is false. According to Feynmann, it is simply not true that the photon must have passed through either one slit or the other.
Dec
7
comment How far back can you trace a photon?
You start by saying you are going to "keep it simple" but then you throw in so many extraneous complications that your answer is all but incomprehensible. Let me list the things you bring up that have nothing to do with the question: the motion of the star relative to the earth, the expansion of space, existence of gravitational "wells" (?), the redshift, the blueshift, and the standard model. And why do you have a second potassium atom...and why do you think there are potassium atoms inside the detector? And how do you "see" an absorption line with a photomultiplier?
Dec
7
comment How far back can you trace a photon?
If there is no energy spread out, then the energy must be concentrated. And in your "standard quantum mechanics", we have local conservation of energy, which means the energy must be somewhere. So you're saying the photon existed from the moment it left the potassium atom. I suppose you're saying if it encountered a double slit along the way, it must have passed through either one or the other of the slits.
Dec
7
comment How far back can you trace a photon?
It seems like I'm saying it didn't become a photon until it entered the detector, and you're saying it was a photon from the moment it left the potassium atom.
Dec
7
answered How far back can you trace a photon?
Dec
6
asked How far back can you trace a photon?
Nov
12
comment Solar vs lunar gravity: inverse square law
The force you caluculate for the sun is much greater. I'm just not sure it's a force you can actually FEEL.
Nov
12
answered Solar vs lunar gravity: inverse square law
Oct
30
answered What is supposition of equilibrium? How do Rayleigh, Jean know the electromagnetic wave in equilibrium behave?
Oct
18
answered Where did Schrödinger solve the radiating problem of Bohr's model?