An invisible band of radiation with wavelengths from 400 to 10 nm, ultraviolet (UV) light starts at the end of visible light and ends at the beginning of X-rays. The primary source of ultraviolet ...

For these people and those born without a lens, UV light looks like a pale blue or pale violet, Bok said. In a famous example ...

Here's how these UV light sanitizers actually work. UV light is highly effective at killing germs The three main types of UV rays are UVA, UVB, and UVC. Because UVC rays have the shortest ...