ultraviolet ray


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Related to ultraviolet ray: infrared ray, Gamma rays, visible light

ultraviolet ray

An invisible ray of the spectrum beyond the violet rays. The wavelengths of ultraviolet rays vary. They may be refracted, reflected, and polarized, but will not traverse many substances impervious to the rays of the visible spectrum. They rapidly destroy the vitality of bacteria, and are able to produce photochemical and photographic effects.
See also: ray
References in periodicals archive ?
The black light lamp which produces the ultraviolet ray intensity is higher than in the sunlight by far the ultraviolet ray intensity, also the duration to the human body harmful influence to be longer.
In addition to their photochromic properties, Transitions Comfort Lenses are lightweight, scratch-resistant and protect from ultraviolet rays.
Ultraviolet rays permanently transmogrify these adjoining thymines into gnarled, double-looped structures that interfere with DNA replication and repair.
A traditional multi-ply roof is typically topped with crushed gravel to protect it from ultraviolet rays.
She just wanted a patch of shade where she could read without squinting -- something to protect her face from the sun's harmful ultraviolet rays and constant island tradewinds.
The hole is a reduction in the ozone layer that normally shields Earth's surface from much of the sun's ultraviolet rays.
Finally, the many conventional interpretive panels are left in place because they are made of special materials that withstand anything from dirty floodwaters to the sun's ultraviolet rays.
Experts are now scrutinizing three solar variables as likely agents of terrestrial change: the sun's overall brightness, which is seen as affecting temperatures; the sun's ultraviolet rays, which are seen as affecting winds and ozone production high in the atmosphere; and the sun's storms of magnetic fields and subatomic particles, which are seen as affecting rainfall and the amount of cloud cover.
Protection from the sun's hazardous ultraviolet rays is as essential for your eyes as it is for your skin.
Two scientists have discovered that visible red light induces tiny tumors on the leaves of tomato and certain other plants growing in an environment shielded from the sun's ultraviolet rays.
The new WriteSHIELD(TM) C2 Screen Protector Series is a crystal-clear screen protector, which still blocks 99 percent of ultraviolet rays that could damage the LCD while allowing greater than 90 percent light transmittance from the LCD.
Then, the muffled jackhammer staccato of the laser, pumping out six bursts of cold ultraviolet rays every second.

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