Is 405nm UV?

Is 405nm Ultraviolet Light?

The electromagnetic spectrum is broadly divided into different regions based on wavelength. The region termed UV, or ultraviolet light, generally encompasses wavelengths from about 10 nm to 400 nm. This range is further categorized into three main bands: UVA (320-400 nm), UVB (280-320 nm), and UVC (100-280 nm).

At 405 nm, the wavelength resides just outside of the traditional UV range, often considered the violet or 'near-ultraviolet' part of the spectrum. This wavelength is close to the visible light spectrum and is sometimes used in applications such as curing adhesives, 3D printing, and non-harmful disinfection methods. Devices that emit 405 nm light are typically referred to as employing 'violet' or 'purple' light, which is visible to the human eye and is on the border between visible light and ultraviolet.

In summary, while 405 nm is close to the ultraviolet range, it is technically not classified as UV light since it falls slightly beyond the traditional UV range. Instead, it is often considered as 'near-ultraviolet' or the extreme violet end of the visible spectrum.