光

Also known as lights, near-visible light, near-visible spectrum, near-visible electromagnetic radiation, light wave

肉眼可见的电磁波

OverviewAI-generated

Light is an electromagnetic wave and optical radiation that is the opposite of darkness. It has a speed of 299792458 and is composed of photons. The subject possesses a spectrum and is studied by optics. It is distinct from the visible spectrum.

Light has uses in the visual system, photosynthesis, art, and video art. It is referenced by 2,312 other encyclopedia articles. The topic appears on the Wikipedia:List of articles all languages should have and Wikipedia:Vital articles/Level/4. It is described by sources including the Brockhaus and Efron Encyclopedic Dictionary, Encyclopædia Britannica 11th edition, Oxford English Dictionary, and Monash University.

Synthesized by Vinony from 17 facts across 3 sources: Wikidata, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Research

1,257,782 papers

[Artificial light at night].ReviewUgeskrift for laeger · 2026Jensen CN, Madsen HØ, Martiny K et al.DOI: 10.61409/V06250466
What is light? The visible spectrum and beyond.ReviewEye (London, England) · 2016Sliney DHDOI: 10.1038/eye.2015.252
Seeing the Light: Perception and Discrimination of Illumination Color.ReviewAnnual review of vision science · 2025Hurlbert A, Yu CDOI: 10.1146/annurev-vision-121423-013755
Dark matters: effects of light at night on metabolism.ReviewThe Proceedings of the Nutrition Society · 2018Nelson RJ, Chbeir SDOI: 10.1017/S0029665118000198
Light behind bars: how light impacts mental health in prisons.ReviewInternational journal of prison health · 2025Urrutia-Moldes ADOI: 10.1108/IJOPH-11-2024-0074
Effects of outdoor artificial light at night on human health and behavior: A literature review.ReviewEnvironmental pollution (Barking, Essex : 1987) · 2023Wang T, Kaida N, Kaida KDOI: 10.1016/j.envpol.2023.121321
Light wavelength and pulsing frequency affect avoidance responses of Canada geese.PeerJ · 2023Lunn R, Baumhardt PE, Blackwell BF et al.DOI: 10.7717/peerj.16379
Light-emitting diodes (LED) for domestic lighting: any risks for the eye?ReviewProgress in retinal and eye research · 2011Behar-Cohen F, Martinsons C, Viénot F et al.DOI: 10.1016/j.preteyeres.2011.04.002

via PubMed

Wikidata facts

Subclass of: optical radiation
Has part: photon
Image: Emanation.png
Speed: 299792458
Has use: video art

Show 8 more facts

Commons category: Light
opposite of: darkness
Commons gallery: Light
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
studied by: optics
has characteristic: spectrum
described by source: Monash University
Stack Exchange tag: astronomy.stackexchange.com/tags/light

Sources (6)

via Wikidata · CC0

Article · 中文

光通常指的是人類眼睛可以見到的電磁波（可見光），視知覺就是對於可見光的知覺。可見光只是電磁波譜上的某一段頻譜，一般是定義為波長介於400至700奈米（nm）之間的電磁波，也就是波長比紫外線長，比紅外線短的電磁波。有些資料來源定義的可見光的波長範圍也有不同，較窄的有介於420至680nm，較寬的有介於380至800nm。在電磁波中，電場與磁場互相垂直。而有些非可見也可以被稱為光，如紫外光、紅外光、X光。光是一种电磁波，光在楊氏雙縫實驗中體現波繞射的特性。在光電效應中，光是由光子的基本粒子組成的粒子流。因為光同时具有粒子性与波动性，所以说光具有“波粒二象性”。

Abstract from DBpedia / Wikipedia · CC BY-SA