- 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.en.wikipedia.org/wiki/Light
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- nounlight (noun) · lights (plural noun)
- the natural agent that stimulates sight and makes things visible:"the light of the sun" · "the street lamps shed a faint light into the room"Similar:electric lightray of lightshaft of lightbeam of lightlight of daynatural lightdaylight hourshours of sunlight
- a source of illumination, especially an electric lamp:"a light came on in his room"
- (lights)decorative illuminations:"Christmas lights"
- (lights)a traffic light:"turn right at the lights"
- the amount or quality of light in a place:"the plant requires good light" · "in some lights she could look beautiful"
- lawthe light falling on the windows of a house. See ancient lights.
- an expression in someone's eyes indicating a particular emotion or mood:"a shrewd light entered his eyes"
- an area of something that is brighter or paler than its surroundings:"sunshine will brighten the natural lights in your hair"
- a window or opening to let light in:"the bedroom has a wide bay with leaded lights"
- a perpendicular division of a mullioned window.
- a pane of glass forming the roof or side of a greenhouse or the top of a cold frame.
- BRITISH(in a crossword puzzle) a blank space to be filled by a letter.
verblight (verb) · lights (third person present) · lit (past tense) · lighting (present participle) · lighted (past participle)adjectivelight (adjective) · lighter (comparative adjective) · lightest (superlative adjective)OriginOld English lēoht, līht (noun and adjective), līhtan (verb), of Germanic origin; related to Dutch licht and German Licht, from an Indo-European root shared by Greek leukos ‘white’ and Latin lux ‘light’.adjectivelight (adjective) · lighter (comparative adjective) · lightest (superlative adjective)- of little weight; not heavy:"they are very light and portable" · "light alloy wheels" · "you're as light as a feather"Similar:Opposite:
- deficient in weight, especially by a specified amount:"the sack of potatoes is 5 kilos light"
- not strongly or heavily built or made:"light, impractical clothes" · "light armour"
- carrying or suitable for small loads:"light commercial vehicles"
- carrying only light armaments:"light infantry"
- (of a vehicle, ship, or aircraft) travelling unladen or with less than a full load.
- (of soil) friable, porous, and workable.Opposite:
- (of an isotope) having not more than the usual mass; (of a compound) containing such an isotope.
- relatively low in density, amount, or intensity:"passenger traffic was light" · "light autumn rains"
- (of a foodstuff) low in fat, cholesterol, sugar, or other rich ingredients:"stick to a light diet"
- (of drink) not strongly alcoholic or heavy on the stomach:"a light Hungarian wine"
- (of pastry or cake) fluffy or well aerated during cooking:"it was delicious, the pastry light and flaky"
- archaic(of a woman) having many casual sexual encounters or relationships.
OriginOld English lēocht, līht (noun), lēohte (adverb), of Germanic origin; related to Dutch licht and German leicht, from an Indo-European root shared by lung.verblight (verb) · lights (third person present) · lit (past tense) · lit (past participle) · lighted (past tense) · lighted (past participle) · lighting (present participle)OriginOld English līhtan (in light; also ‘lessen the weight of’), from light; compare with alight. - See more
See all on WikipediaLight - Wikipedia
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 … See more
Generally, electromagnetic radiation (EMR) is classified by wavelength into radio waves, microwaves, infrared, the visible spectrum that … See more
The study of light and the interaction of light and matter is termed optics. The observation and study of optical phenomena such as rainbows and the aurora borealis offer … See more
Light is measured with two main alternative sets of units: radiometry consists of measurements of light power at all wavelengths, while See more
Classical Greece and Hellenism
In the fifth century BC, Empedocles postulated that everything was composed of See moreThere are many sources of light. A body at a given temperature emits a characteristic spectrum of black-body radiation. A simple thermal source is See more
Light exerts physical pressure on objects in its path, a phenomenon which can be deduced by Maxwell's equations, but can be more easily … See more
Wikipedia text under CC-BY-SA license Light - Simple English Wikipedia, the free encyclopedia
WebWhen light hits a transparent object, it passes through it, almost completely with making a shadow. Light is a form of electromagnetic radiation that shows properties of both waves …
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Light | Definition, Properties, Physics, Characteristics, …
WebApr 6, 2024 · Learn about light, the electromagnetic radiation that can be detected by the human eye, from Britannica. Explore the history, theory, and applications of light in science and technology.
Speed of light - Wikipedia
WebThe speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per …
Photon - Wikipedia
WebA photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force …
Light and its properties | Britannica
WebLearn about light, the visible portion of the electromagnetic spectrum, and its wave-particle duality. Explore the history and science of light, from Roger Bacon to Albert Einstein, …
Speed of light - Simple English Wikipedia, the free encyclopedia
WebThe speed of light, in any medium, which is usually denoted by , is a physical constant important in many areas of physics. It is denoted by 'c^0' especially in vacuum medium, …
Light - Wikimedia Commons
WebAug 6, 2023 · 1 Light behavior. 1.1 Diagrams. 1.2 Science photos. 2 Illustrations. 3 Sunlight. 4 Moonlight. 5 Lighting. 6 bioluminescence. 7 Light in art. 8 Light meters. 9 Category …
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