Definition

Noun: * Electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays: A type of invisible energy from the sun and artificial sources, with wavelengths approximately between 10 and 400 nanometers. It is often divided into UVA, UVB, and UVC categories.

Usage

• Ultraviolet radiation is a scientific and technical term used primarily in contexts related to physics, astronomy, health, and environmental science.
• It is commonly used to discuss its effects, such as causing sunburn, enabling vitamin D production, or posing risks that require protection.

Examples

• Noun:
  • The ozone layer helps to filter out much of the sun's harmful ultraviolet radiation.
  • Some insects can see ultraviolet radiation, which is invisible to the human eye.
  • Prolonged exposure to ultraviolet radiation can increase the risk of skin cancer.

Advanced Usage

• "To be exposed to ultraviolet radiation": To be subjected to or come into contact with UV rays.
  • Laboratory workers must take precautions to avoid being exposed to ultraviolet radiation from the equipment.
• "Block ultraviolet radiation": To prevent UV rays from passing through.
  • These sunglasses are designed to block 99% of ultraviolet radiation.

Variants and Related Words

• Ultraviolet (UV) light (n): A common synonym, often used in less formal or general contexts.
  • Ultraviolet light is used to sterilize medical equipment.
• Ultraviolet (UV) rays (n): Another common synonym, frequently used when discussing effects on living organisms.
  • Apply sunscreen to protect your skin from UV rays.
• UV index (n): A standardized measurement of the strength of ultraviolet radiation from the sun at a particular place and time.
  • The weather forecast warned of a very high UV index today.

Synonyms

• UV radiation: The abbreviated form.
• Actinic rays: A more technical term used in some scientific contexts, emphasizing the chemical effects of the radiation.

Related Phrases

• Ultraviolet radiation therapy: The use of controlled UV exposure for medical treatment, such as for certain skin conditions.
  • The patient underwent ultraviolet radiation therapy for psoriasis.
• Ultraviolet radiation damage: Harm caused by overexposure to UV rays.
  • Ultraviolet radiation damage to the eyes can contribute to cataracts.

Noun

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