Definition

Noun: * Electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays: "Ultraviolet light" refers to a type of invisible radiation from the sun or artificial sources, with wavelengths approximately between 10 and 400 nanometers. It is often abbreviated as UV light.

Usage

• "Ultraviolet light" is a non-count noun. It is used to describe the radiation itself as a general phenomenon or type.
• It is commonly used in scientific, medical, and everyday contexts related to sunlight, health, and technology.

Examples

• Noun:
  • The sun emits ultraviolet light, which can cause sunburn.
  • Some insects can see ultraviolet light, which is invisible to humans.
  • The bank uses a special lamp to check for security marks with ultraviolet light.

Advanced Usage

• "to be exposed to ultraviolet light": to come into contact with UV radiation.
  • Prolonged exposure to ultraviolet light can damage the skin.
• "ultraviolet light irradiation": the process or treatment of applying UV light.
  • Ultraviolet light irradiation is used to disinfect water in some systems.

Variants and Related Words

• Ultraviolet (UV) radiation (n): A more formal or scientific synonym for "ultraviolet light."
• UV light (n): A common abbreviation.
• Ultraviolet (adj): Used to describe things related to this type of light (e.g., , ).

Synonyms

• UV radiation: Electromagnetic radiation in the ultraviolet range.
• Black light: A common term for ultraviolet light, especially when it causes certain materials to fluoresce.

Related Phrases

• Ultraviolet index (UVI): A standard measurement of the strength of sunburn-producing ultraviolet radiation at a particular place and time.
  • The weather report includes the ultraviolet index to help people plan sun protection.

Noun

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