What If? (xkcd) personal blog
Laser Pointer
If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color?
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Linked from 21 Hacker News comments by 21 different people, from Mar 2013 to Jul 2025.
Most recent:
- samus · Jul 6, 2025
- Sohcahtoa82 · May 21, 2025
- gmuslera · Apr 28, 2024
- undecisive · Apr 9, 2021
- 8bitsrule · Dec 25, 2020
- outworlder · Oct 7, 2020
