ultraviolet

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ultraviolet

An ultraviolet lamp helps scientists study fluorescent minerals.

Definition

  1. Adjective:

    • Having or employing electromagnetic radiation with wavelengths shorter than those of visible violet light but longer than those of X-rays. This radiation is not visible to the human eye.
    • Relating to, producing, or using such radiation.

  2. Noun (uncountable):

    • The band or range of this invisible electromagnetic radiation.
Usage and Examples

  • Adjective:

    • Sunscreen is essential to protect your skin from harmful ultraviolet rays.
    • The museum uses ultraviolet light to check the authenticity of the painting.
    • Some flowers have patterns visible only under ultraviolet light.

  • Noun:

    • Excessive exposure to ultraviolet can cause sunburn and skin damage.
    • The ozone layer helps to filter out much of the sun's ultraviolet.
Advanced Usage and Notes
  • The term is often abbreviated as UV.
  • In scientific contexts, the ultraviolet spectrum is commonly divided into sub-ranges: UVA, UVB, and UVC, based on wavelength and biological effect.
  • As a noun, it is typically used without an article (e.g., "exposed to ultraviolet") or with "the" when referring to the specific phenomenon (e.g., "the ultraviolet from the sun").
Variants and Related Words
  • UV (abbreviation): The standard abbreviation for ultraviolet.
    • A UV index is provided in weather reports.
  • Ultraviolet radiation (noun phrase): A more formal or specific term for the noun form.
    • Ultraviolet radiation is a known carcinogen.
Synonyms
  • UV light (noun): A common synonym, though technically "light" implies visibility.
  • Black light (noun): Colloquial term for ultraviolet lamps, especially those that cause fluorescent materials to glow.
Related Scientific Terms
  • Electromagnetic spectrum: The full range of electromagnetic radiation, which includes radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
  • Fluorescence: The property of absorbing radiation (often ultraviolet) and re-emitting it as visible light.
ultraviolet

An ultraviolet lamp helps scientists study fluorescent minerals.

Adjective
  1. 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
Noun
  1. radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

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