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The meaning of ULTRAVIOLET is situated beyond the visible spectrum at its violet end —used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays. How to use ultraviolet in a sentence.
Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.
Relating to electromagnetic radiation having frequencies higher than those of visible light but lower than those of x-rays, approximately 10 15 –10 16 hertz. Some animals, such as bees, are capable of seeing ultraviolet radiation invisible to the human eye. See more at electromagnetic spectrum.
May 31, 2024 · Ultraviolet (UV) radiation is undetectable by the human eye, although, when it falls on certain materials, it may cause them to fluoresce —i.e., emit electromagnetic radiation of lower energy, such as visible light. Many insects, however, are able to see ultraviolet radiation.
ULTRAVIOLET definition: 1. Ultraviolet light has a wavelength that is after the violet (= light purple) end of the range of…. Learn more.
adjective [ not gradable ] us / ˌʌl·trəˈvɑɪ·ə·lɪt / Add to word list. physics. describes light at the purple end of the spectrum (= set of colors into which light is separated), which cannot be seen by human beings. (Definition of ultraviolet from the Cambridge Academic Content Dictionary © Cambridge University Press) Examples of ultraviolet.
Aug 24, 2023 · UV radiation is a form of electromagnetic energy emitted primarily by the sun and specific artificial sources. It falls just beyond the violet end of the visible light spectrum, making it...
Definitions of ultraviolet. adjective. having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end. “ ultraviolet radiation” “an ultraviolet lamp” synonyms: invisible, unseeable. impossible or nearly impossible to see; imperceptible by the eye. noun.
Apr 1, 2023 · Ultraviolet light or UV is electromagnetic radiation in the wavelength range of 10 to 400 nanometers (nm), which is between x-rays and visible light. Because it is largely invisible to humans, another name for UV is black light.
Feb 12, 2024 · The ultraviolet (UV) index is a number on a scale from 1-11+ that tells you how intense the UV rays from the sun are predicted to be at a particular time and place....
