luminescence

/,lu:mi'nesns/

Thân thiện

The jellyfish glows with a soft blue luminescence in the dark ocean.

Definition

Noun: 1. The emission of light by a substance not resulting from heat: Luminescence is a type of cold light, produced by processes other than high temperature (incandescence). It occurs when a material absorbs energy and then re-emits that energy as visible light. 2. The light so produced: The visible glow itself, often at low temperatures.

Usage

• Luminescence is a scientific term used to describe various natural and artificial phenomena involving "cold light."
• It is often modified by a preceding word specifying the energy source that causes the light emission (e.g., , , ).

Examples

• Noun:
  • The deep-sea anglerfish uses bioluminescence to attract prey. (Here, 'bioluminescence' is a specific type of luminescence.)
  • Scientists studied the green luminescence of the mineral under ultraviolet light.
  • The watch dial had a faint luminescence that made it readable in the dark.

Advanced Usage

• Adjective: Luminescent: Describing something that emits light via luminescence.
  • The cave was filled with luminescent fungi.
• Verb: Luminesce: The action of emitting luminescent light.
  • Certain chemicals luminesce when mixed together.

Variants and Related Words

• Bioluminescence (n): Luminescence produced by a living organism (e.g., fireflies, jellyfish).
• Chemiluminescence (n): Luminescence resulting from a chemical reaction.
• Photoluminescence (n): Luminescence caused by the absorption of light (e.g., fluorescence, phosphorescence).
• Electroluminescence (n): Luminescence produced by an electric current or field.
• Phosphorescence (n): A type of photoluminescence where light emission continues for a time after the energy source is removed.
• Fluorescence (n): A type of photoluminescence where light emission stops almost immediately when the energy source is removed.

Synonyms

• Glow
• Cold light
• Phosphorescence (in specific contexts)
• Fluorescence (in specific contexts)

Antonyms

• Incandescence (light from heat)
• Darkness

Học thuật

Noun

1. light from nonthermal sources
2. light not due to incandescence; occurs at low temperatures

Từ đồng nghĩa

• glow