Can you burn paper with moonlight? Part 1.
Автор: Deeper Science
Загружено: 2024-02-02
Просмотров: 237
This video presents the physics behind the impossibility of concentrating light beyond a certain point. More information can be found at:
https://what-if.xkcd.com/145/
https://en.wikipedia.org/wiki/Etendue
https://www.askamathematician.com/201...
https://physics.stackexchange.com/que...
https://physics.stackexchange.com/que...
Note that many comments in the last three links have errors, which are discussed in the video.
The Cooke paper is
Dave Cooke" Sun-pumped lasers: revisiting an old problem with nonimaging optics", 20 December 1992 / Vol. 31, No. 36 / APPLIED OPTICS 7541-7546
Part 2 and 3 of this series:
• Can you burn paper with moonlight? Part 2.
• Can you burn paper with moonlight? Part 3.
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