The range value of Ultraviolet (UV) light is typically considered to be 100 – 400 nm.
Here's a breakdown of the UV spectrum:
- UV-A (315–400 nm): Also known as near UV, it is the closest to visible light.
- UV-B (280–315 nm): Has higher energy than UV-A and is responsible for sunburn.
- UV-C (100–280 nm): The highest energy UV radiation, but it is mostly absorbed by the Earth's atmosphere. A portion of 100-190 nm is sometimes referred to as vacuum UV.
The provided context also mentions "far ultraviolet" as the 100 – 190 nm range, and visible light extends from 400 - 800 nm.