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| bio | website | marty-green.blogspot.com |
|---|---|---|
| location | Canada | |
| age | ||
| visits | member for | 2 years, 1 month |
| seen | 20 hours ago | |
| stats | profile views | 338 |
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Jan 27 |
comment |
Reflectance of Round Moon vs Flat Moon Very nice. If you edit your correction into your answer I will be glad to mark it as accepted. |
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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? |
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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%. |
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Jan 27 |
asked | Reflectance of Round Moon vs Flat Moon |
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Jan 25 |
answered | The Sun Can Make Stuff Hotter Than Itself |
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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. |
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Jan 24 |
answered | Global warming and planetary thermodynamics |
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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? |
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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. |
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Jan 18 |
revised |
Historical background of wave function collapse added 1527 characters in body |
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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. |
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Jan 15 |
revised |
How is this classical “paradox” resolved in electromagnetism? added 788 characters in body |
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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... |
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Jan 15 |
answered | How is this classical “paradox” resolved in electromagnetism? |
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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. |
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Dec 28 |
answered | How do we visualise antenna reception of individua radiowave photons building up to a resonant AC current on the antenna? |
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Dec 25 |
answered | Polarisation directions in standing waves in cubical cavity |
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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. |
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Dec 23 |
revised |
Measuring the spin of a single electron added 875 characters in body |
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Dec 22 |
revised |
Trying to understand the EPR paradox added 248 characters in body |
