Timeline for What is black-body equivalent of UV part of solar spectrum?
Current License: CC BY-SA 4.0
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| Feb 18, 2021 at 17:57 | history | edited | fanyul | CC BY-SA 4.0 |
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| Feb 17, 2021 at 12:33 | comment | added | fanyul | Hmm... OK, my bad. What I didn't think about, that it's impossible to concentrate non-parallel rays from an extent source into an infinitesimally small point. Because that's what the conservation of etendue tells, isn't it? (And it would be necessary, as the parallel part of the black body radiation is infinitesimally small.) | |
| Feb 17, 2021 at 10:15 | comment | added | shai horowitz | there's the conservation of etendue for one thing. en.wikipedia.org/wiki/Etendue#Conservation_of_etendue. See here for more details as well physics.stackexchange.com/questions/338865/… | |
| Feb 17, 2021 at 10:05 | comment | added | fanyul | Theorically I don't see why it's impossible to focus (part of) the radiation on a surface small enough. | |
| Feb 17, 2021 at 0:51 | comment | added | shai horowitz | Heating something up using black body radiation to a temperature hotter then the surge that emitted that radiation isn't so simple. The situation is much more nuanced. In general it is impossible to focus the black body radiation into a smaller surface as you say | |
| Feb 16, 2021 at 22:03 | history | edited | fanyul | CC BY-SA 4.0 |
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| Feb 16, 2021 at 17:37 | history | edited | fanyul | CC BY-SA 4.0 |
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| Feb 16, 2021 at 16:48 | history | edited | fanyul | CC BY-SA 4.0 |
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| Feb 16, 2021 at 16:41 | history | answered | fanyul | CC BY-SA 4.0 |