4 ms·
If true that would be terrible. Because higher wavelength UV is very dangerous. And are you sure about this? When visible light gets reflected by a wall it doe
by 323 5y ago
If true that would be terrible. Because higher wavelength UV is very dangerous.
And are you sure about this? When visible light gets reflected by a wall it doesn't seem to change wavelength significantly (color basically remains the same).
- bratwurst3000 5y agoOkey i wasnt clear. The wall has to interact with the radiation. Thats why you see colours. https://wonderopolis.org/wonder/why-does-a-black-light-make-things-glow https://wonderopolis.org/wonder/why-does-a-black-light-make-...