black light


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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.
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black light

[′blak ‚līt]
(optics)
Invisible light, such as ultraviolet rays which fall on fluorescent materials and cause them to emit visible light.

black light

Invisible ultraviolet electromagnetic energy near the visible spectrum; useful for exciting fluorescent paints, dyes, etc., so that they become visible.
References in periodicals archive ?
If the black light test works, it represents a real advance in observing how shot moves though the air at normal game contact ranges.
Black light connotes a certain psychedelic or nightclub vibe.
Yes, it's a very familiar problem, but doing the asking this time is Huddersfield-based Black Light Productions, one of the UK's fastest growing youth theatre production companies.
If you put that stuff under a black light it shows like it's radioactive.
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PRAGUE The award-winning National Black Light Theater Prague has signed with Columbia Artists Management Inc.
I should not have worn a white bra because, once the black light hit, the bra showed through my shirt
One is tempted to read the book by black light while wearing paisley and listening to Kool & the Gang or the Ohio Players on vinyl.
Fluorescent Felt[TM] is available in four bright neon colors and fluoresces under black light.
Wearing the "Armor of God" under a black light renders one invisible and, one presumes, impervious to evil.
The dyed cracks then are viewed under a bright light (or black light if an ultraviolet dye was used).