A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light. [1][2][3] One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV, [2]...

2020年6月4日 · Black light is ultraviolet light or a lamp that emits most of its light in the ultraviolet part of the spectrum. Black light is beyond the range of human vision, so a room illuminated with a black light appears dark. Other names for black light are ultraviolet light or UV-A light.

Ultraviolet light encompasses a wide range of wavelengths, but most blacklight applications utilize a narrow range of ultraviolet radiation (UV-A) to produce fluorescence effects - specifically between 350 and 400 nm (nanometers).

2024年10月13日 · While black lights are a specific type of UV-A light meant for safe, everyday use in entertainment, forensics, and security, other forms of UV light (like UV-B and UV-C) are essential for medical treatments, disinfection, and industrial processes.

2019年5月5日 · A black light is a type of lamp that emits primarily ultraviolet light and very little visible light. Because the light is outside the range of human vision, it is invisible, so a room illuminated with a black light appears dark.

2022年6月9日 · Blacklight is a specific type of (mostly) UVA light that looks dark purple – at least the small amount of light that is in the visible spectrum wavelength. Most of the light that a black light emits is in the UVA category, invisible to the human eye.

2025年1月19日 · Many people have heard of UV light and black light, but they often confuse the two. The main difference is that black light refers specifically to a type of ultraviolet light that emits long wavelengths, primarily in the UVA range, which is invisible to the human eye.