| 释义 |
black light
black light n. 1. Invisible ultraviolet or infrared radiation. Black light causes fluorescent materials to emit visible light and is used to take pictures in the dark. 2. A lamp designed to produce such radiation: rented a black light for the Halloween party. black light n (General Physics) the invisible electromagnetic radiation in the ultraviolet and infrared regions of the spectrum black′ light′
n. invisible infrared or ultraviolet light. [1925–30] Translationsblack light
black light: see ultraviolet radiationultraviolet radiation,
invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hertz.
..... Click the link for more information. .black light[′blak ‚līt] (optics) Invisible light, such as ultraviolet rays which fall on fluorescent materials and cause them to emit visible light. black lightInvisible ultraviolet electromagnetic energy near the visible spectrum; useful for exciting fluorescent paints, dyes, etc., so that they become visible.black light
black lightn. Invisible ultraviolet or infrared radiation. Black light causes fluorescent materials to emit visible light and is used to take pictures in the dark.ThesaurusSeeultraviolet radiation |