Timeline for Solar visible light spectrum
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Oct 20, 2017 at 5:45 | comment | added | ProfRob | Photospheric pressure is about 0.1 of Earth's atmospheric pressure... | |
| Oct 20, 2017 at 0:50 | history | edited | HDE 226868♦ | CC BY-SA 3.0 |
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| Oct 20, 2017 at 0:11 | comment | added | HDE 226868♦ | @RobJeffries I suppose I misinterpreted a sentence in my textbook: "In a dense gas, pressure broadening becomes so significant that the medium becomes optically thick at all frequencies, and photons of all energies can be absorbed and emitted". That leads to a spectrum described by the Planck function. I think I incorrectly worked backwards from that to assume that the optical thickness in the Sun was due to pressure broadening. | |
| Oct 19, 2017 at 23:30 | comment | added | ProfRob | What are you discussing pressure broadening for? The reason the Sun at all resembles a blackbody (it is not that close) is H minus opacity, which means it is optically thick over a broad range of wavelengths at a similar temperature. | |
| Oct 19, 2017 at 20:59 | comment | added | HDE 226868♦ | @RobJeffries Which part in particular is incorrect? I don't think I really discussed the source of the opacity. | |
| Oct 19, 2017 at 18:55 | history | answered | HDE 226868♦ | CC BY-SA 3.0 |