network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 1 month |
| seen | Feb 17 at 22:11 | |
| stats | profile views | 6 |
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Feb 17 |
asked | Erratic light spot in optical projection |
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Feb 17 |
comment |
maximum positive electric charge of solid body What kind of setup could achieve that charges? |
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Aug 18 |
comment |
maximum positive electric charge of solid body Are those $Vm^{-1}$ values theoretical ones or in reach for experimental techniques? |
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Aug 18 |
asked | maximum positive electric charge of solid body |
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Aug 16 |
answered | Why we don't see long range airborne CO2 lasers? |
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Aug 16 |
awarded | Supporter |
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Aug 16 |
comment |
Density and statistical models for visible air dust Yes, there are definitely 'large' particles involved, like dust and mist drops, which may be invisible to the bare eye, but are visible as single particles if illuminated brightly. So I think my question is not so much about the scattering details but more about the statistics of particles in the air, their size and their reflection ability (maybe just their 'color'?). |
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Aug 15 |
asked | Density and statistical models for visible air dust |
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Apr 8 |
comment |
Trapping a lightray I think the MathOverflow answer state that there is a solution for a trapped photon between surfaces, but no need for an 'entry hole' like we have here. If we have a hole, the beam cannot be trapped in a finite reflection cycle (it would hit the hole again) but must hit a new spot after every reflection. This however should be possible, if the locations in the alternating reflection sequence approach two limit points. |
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Apr 8 |
comment |
light ray 'entropy' Thanks! If you post that as an answer, I will accept it. An addition: If I would use a solar cell and an electrical lightsource both highly effective, it should be possible to build the box. Is this possible becuase it's by non-optic means, or is there a deeper law that would limit the effectivenes of the cell or the source to impede this? |
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Apr 8 |
awarded | Student |
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Apr 8 |
asked | light ray 'entropy' |
