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bio website marty-green.blogspot.com
location Canada
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visits member for 4 years, 3 months
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Jan
27
comment Reflectance of Round Moon vs Flat Moon
Would it be a better question if I didn't mention that I'd tried to solve it already?
Jan
27
comment Reflectance of Round Moon vs Flat Moon
I think you have an extra factor of cos(theta) for the spherical moon. Yes, the Lambertian intensity give you a factor of cos(theta) but this only compensates for the greater area of the section. The real effect of the Lambertian profile is that the brightness looks the same regardless of viewing angle, so those factors cancel out. In other words, where you would have an effective brightness of 1/2 at 45 degrees off axis, I would have 71%.
Jan
27
asked Reflectance of Round Moon vs Flat Moon
Jan
25
answered The Sun Can Make Stuff Hotter Than Itself
Jan
25
comment Global warming and planetary thermodynamics
Imagine you could manufacture a kind of magical transparent Styrofoam and cover the earth with it in a layer 100 feet deep. As long as it was truly transparent over the whole spectrum, it would not have the slightest effect on the equilibrium temperature on the surface of the earth. That is why I think it misses the point to blame the greenhouse effect on the insulating properties of CO2.
Jan
24
answered Global warming and planetary thermodynamics
Jan
18
comment Historical background of wave function collapse
Yes, I did miss that point. I read the Mott paper a couple of years ago and I don't remember the role of ionization in the process. I don't believe Mott dealt in any way with the mechanism of track formation. What exactly is the importance of ionization? Isn't the cloud chamber in a metastable state to begin with, and won't the clouds eventually just form on their own without any disturbance?
Jan
18
comment Historical background of wave function collapse
Thank you for the excellent response, Ron. The comment field is too short for me to respond to it so I have placed my response as an edit to my question.
Jan
18
revised Historical background of wave function collapse
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Jan
15
comment How is this classical “paradox” resolved in electromagnetism?
I'm going to eat my words. Having posted the picture, it's pretty obvious that the guy pushing the pipe is doing the work. There is a reaction force from the magnetic field that he is pushing against, and that's why the electrons move to the left, but obviously the magnet isn't providing any energy.
Jan
15
revised How is this classical “paradox” resolved in electromagnetism?
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Jan
15
comment How is this classical “paradox” resolved in electromagnetism?
Ron, I'm going to edit my response with a picture in response to your comment. The constraint force is indeed important, but I think you will agree it turns out to be the vxB force which does the work after all...
Jan
15
answered How is this classical “paradox” resolved in electromagnetism?
Jan
15
comment How can indeterminacy in quantum mechanics be derived from lack of ability to observe a cause?
Contrary to Nick's implication, I think the question is perfectly worded and it is in fact THE question of quantum mechanics. The uncertainty is frequently described in terms of a mere practical issue; even Feynmann does this in explaining the double slit. EPR insists the uncertainty goes much deeper than this, and Bell makes it a practical issue subject to experiment. If the OP doesn't understand this, he's in good company.
Dec
28
answered How do we visualise antenna reception of individua radiowave photons building up to a resonant AC current on the antenna?
Dec
25
answered Polarisation directions in standing waves in cubical cavity
Dec
23
comment Measuring the spin of a single electron
I stumbled independently on Jared Stenson's master's thesis, and it has some things even more interesting that the paper you've flagged. The Master's Thesis is at contentdm.lib.byu.edu/ETD/image/etd908.pdf and I discuss its implications in my blog, which I've linked to in my own answer.
Dec
23
revised Measuring the spin of a single electron
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Dec
22
revised Trying to understand the EPR paradox
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Dec
21
revised Is energy conserved in decay of hydrogen atom in superposed state?
refer to supporting documentation