Black light is a term used to describe ultraviolet light that is not visible to the human eye. There are several synonyms used for the term black light, including UV light, ultraviolet radiation, and UV rays. Other terms that might be used to describe black light include fluorescent light, neon light, and glow-in-the-dark light. These terms are often used interchangeably and refer to light that emits a unique wavelength of electromagnetic radiation that can be used in a variety of applications, including scientific research, medical treatment, and entertainment. Whether you refer to it as black light, UV light, or neon light, this type of illumination has many fascinating properties.