light
Sign in to savethumb|upright=1.3|A triangular dispersive prism|prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (green-blue) are separated.
AI overview
Light is a form of energy that travels as waves of different wavelengths, which our eyes perceive as different colors—with red having longer wavelengths and blue-green having shorter ones. It matters because it's essential for how we see the world and interact with our environment, as shown by how prisms can separate white light into its component colors.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Subclass of
- optical radiation
- Has part
- photon
- Image
- Emanation.png
Show 7 more facts
- P461
- darkness
- P5008
- Wikipedia:Vital articles/Level/4 (2022)
- P2579
- optics
- P1889
- visible spectrum
- P366
- video art
- P1552
- spectrum
Article
21 sectionsContents
- Electromagnetic spectrum and visible light
- Speed of light
- Optics
- Surface scattering
- Refraction
- Measurement
- Light pressure
- Historical theories about light, in chronological order
- Classical Greece and Hellenism
- Classical India
- Descartes
- Particle theory
- Wave theory
- Electromagnetic theory
- Quantum theory
- Quantum optics
- Use for light on Earth
- See also
- Notes
- References
- External links
thumb|upright=1.3|A triangular dispersive prism|prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (green-blue) are separated.
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared (with longer wavelengths and lower frequencies) and the ultraviolet (with shorter wavelengths and higher frequencies), called collectively optical radiation.