3 ms·
Wong UV wavelength range! 222nm is safe for humans [0]! [0]: https://www.nature.com/articles/s41598-020-67211-2 https://www.nature.com/articles/s41598-020-6721
by nikolay 1y ago
Wong UV wavelength range! 222nm is safe for humans [0]!
[0]: https://www.nature.com/articles/s41598-020-67211-2 https://www.nature.com/articles/s41598-020-67211-2