{"id":14012,"date":"2023-09-10T17:08:53","date_gmt":"2023-09-10T17:08:53","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=14012"},"modified":"2023-12-26T08:43:03","modified_gmt":"2023-12-26T08:43:03","slug":"what-is-black-light","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/zh_hk\/%e8%a9%9e%e5%bd%99%e8%a1%a8\/what-is-black-light\/","title":{"rendered":"What is Black Light"},"content":{"rendered":"

What is Black Light<\/h2>\n\n\n

A black light, also known as an ultraviolet (UV) lamp or UV-A light, is a type of lamp that emits ultraviolet light. It is named “black light” because the emitted light is outside the range of human vision, appearing as a dark glow when the lamp is turned on in a dark room. The inventor of glass UV filters, Robert Williams Wood, is honored with the term “Wood’s lamp.” <\/p>\n\n\n\n

Unlike regular light bulbs that primarily emit visible light, a black light emits most of its light in the UV portion of the spectrum, with very little visible light. This makes it useful for applications that require UV radiation, such as counterfeit detection, forensic investigations, and entertainment purposes like creating special effects. <\/p>\n

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The glow observed under a black light is caused by phosphors, which are substances that emit visible light in response to radiation. When the UV radiation emitted by the black light interacts with phosphors, it is converted into visible light, resulting in the characteristic purplish glow. <\/p>\n

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