All articles starting with L
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Light aircraft carrier
A light aircraft carrier, also called a light fleet carrier, is a carrier smaller than a fleet carrier, displacing 10,000 to 20,000 tons and built more quickly and cheaply.
Light aircraft pilot licence
The light aircraft pilot license (LAPL) is an EASA pilot license allowing holders to fly light aircraft up to 2,000 kg non-commercially, carrying at most 3 passengers.
Light and Darkness
Light and Darkness (Meian) is the last novel by the Japanese writer Natsume Soseki, serialized in the Asahi Shimbun in 1916 and left unfinished when he died that December.
Light and elevated temperature-induced degradation
Light and elevated temperature-induced degradation (LeTID) is a defect mechanism in crystalline silicon solar cells that lowers carrier lifetime and power output over months to years.
Light and Space
Light and Space, also called California Minimalism or Finish Fetish, is a Los Angeles art movement active from about 1960 through the 1970s whose works explore light and perception.
Light art
Light art is a form of visual art in which light itself is the primary medium, using sources such as fluorescent tubes, LEDs, and neon.
Light as a Feather (TV series)
Light as a Feather is an American supernatural teen thriller series on Hulu, based on Zoe Aarsen's Wattpad story, in which girls die as a party game predicted.
Light as a feather, stiff as a board
Light as a feather, stiff as a board, also called the levitation game or finger lift, is a sleepover ritual in which a group lifts a person with one or two fingers each while chanting; it works through weight distribution and synchronized timing, documented as early as 1665 and depicted in The Craft (1996).
Light Bringer (novel)
Light Bringer is the 2023 sixth novel of Pierce Brown's Red Rising Saga, sequel to Dark Age. Published by Del Rey on July 25, 2023, a NYT and Sunday Times bestseller following Darrow after his defeat on Mercury; penultimate book before Red God. Not Brent Weeks's Lightbringer fantasy series.
Light chain deposition disease
Light chain deposition disease (LCDD) is a clonal plasma cell disorder with non-amyloid kappa-predominant monoclonal light chain deposits, mainly in kidneys; a form of MIDD described by Randall in 1976, treated with bortezomib and ASCT.
Light clock
A light clock is a thought-experiment timepiece with two parallel mirrors and a light pulse bouncing between them, whose geometry directly yields the time-dilation factor of special relativity.
Light Coagulation
Light coagulation (photocoagulation, German Lichtkoagulation) is thermal treatment of tissue, chiefly the retina, with intense light or laser; pioneered by Meyer-Schwickerath in 1949 and proven by the DRS and ETDRS for diabetic eye disease.
Light commercial vehicle
A light commercial vehicle, also called a light goods vehicle, is a commercial vehicle designed primarily for carrying goods, with a maximum weight of 3.5 tonnes.
Light cone
A light cone is the set of spacetime events reachable from a given event by light, dividing spacetime into regions of possible and impossible causal influence.
Light cruiser
A light cruiser is a warship carrying guns of 6.1-inch (155 mm) caliber or smaller, a category created by the London Naval Treaty of 1930 to distinguish it from heavy cruisers.
Light curve analysis
Light curve analysis is the set of techniques for measuring and modeling a celestial object's brightness over time, revealing periods, masses, and shapes of variable stars, planets, and asteroids.
Light dark matter
Light dark matter is dark matter with particle masses below about 1 GeV, far lighter than WIMPs, so conventional nuclear-recoil detectors cannot see it; electron-scattering experiments like DarkSide-50 search for it.
Light dosimetry
Light dosimetry is the measurement and calculation of light energy delivered to tissue during photodynamic therapy, used to plan treatments and verify the dose received.
Light extraction efficiency
Light extraction efficiency is the fraction of photons generated inside an LED that escape the semiconductor chip rather than being lost to total internal reflection or reabsorption.
Light field imaging
Light field imaging is an imaging method that records both where light rays strike the sensor and their directions, enabling refocusing, depth maps, and 3D reconstruction after capture.
Light field microscopy
Light field microscopy (LFM) is a snapshot 3D imaging method in which a microlens array lets one camera exposure record a specimen's 3D volume, suited to fast biological dynamics.
Light fixture
A light fixture, also called a light fitting or luminaire, is a complete lighting unit holding a light source plus parts to distribute, protect, and power it.
Light gun
A light gun is a gun-shaped video game controller that senses light from a CRT display to determine where the player's shot landed, as with the NES Zapper.
Light heavyweight
Light heavyweight is boxing's 175-pound (79.4 kg) weight class, one of the eight traditional divisions, created in 1903 for Jack Root; unified champion Dmitrii Bivol holds the IBF, WBO, and Ring titles.
Light in August
Light in August is a 1932 novel by William Faulkner, his seventh and fourth set in fictional Yoknapatawpha County, centered on three outsiders in Jefferson, Mississippi.
Light infantry
Light infantry: infantry fighting dismounted without armored vehicles or organic heavy weapons, trading firepower and protection for strategic mobility, restricted-terrain movement, and infiltration capability; distinct from medium (wheeled) and heavy (tracked) infantry.
Light Land Family Recreation Park
Light Land Family Recreation Park (Lightland) is a family light park at Korita–Sjenokosi, about 700 m above Petrovac, Montenegro. A 1 km forest trail with 20,000–30,000 lamps, seven installations, swings, weekend shows; open May–November evenings, closed winter.
Light machine gun
A light machine gun (LMG) is a fully automatic, magazine or belt-fed firearm light enough for one soldier to carry and fire, giving infantry squads sustained suppressive fire.
Light menstrual bleeding
Light menstrual bleeding, or hypomenorrhea (scanty menses), is abnormally light menstrual flow, defined in ICD-11 as under 5 ml monthly blood loss; causes include hormonal factors, PCOS, perimenopause, thyroid disease, and endometrial damage.
Light meter
A light meter, also called an exposure meter or luxmeter, measures light falling on or reflected from a subject and converts the reading into camera exposure settings.