Colorful life

An ultraviolet lamp, also known as a uv blacklight lamp, is a device that emits electromagnetic radiations with wavelengths between visible light and X-rays. The ultraviolet lamp is typically made up of an electric discharge lamp filled with material that emits radiation at the desired wavelength which is shorter than 400nm, and it is further subdivided into UVA(315-400nm), UVB (280-315nm), and UVC(100-280nm). Uv black light tubes are typically housed in quartz or special glass, which transmits ultraviolet radiation better than ordinary glass.

Law enforcement officials can use them to identify the authenticity of money. The United States and many other countries have used an invisible fluorescent strip on their large denominations, which are only shown under black light.