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Concept used in black hole solutions
closed trapped surfaces in 1965. A trapped surface is one where light is not moving away from the black hole. The boundary of the union of all trapped surfaces
Trapped_surface
Alternative of event horizon first suggested by Stephen Hawking
the surface is called trapped. The apparent horizon is the outermost of all trapped surfaces, also called the "marginally outer trapped surface" (MOTS)
Apparent_horizon
Bound between quantum information and spacetime geometry
towards the past, to the interior or the exterior. If B is a trapped surface, such as the surface of a star in its final stages of gravitational collapse,
Bousso's_holographic_bound
Black hole conjecture
Penrose singularity theorem of 1964 it is known that if there is trapped null surface (and some other conditions) then a singularity must form, in 1983
Hoop_conjecture
Use of a device to remotely catch an animal
Animal trapping, or simply trapping or ginning, is the use of a device to remotely catch and often kill an animal. Animals may be trapped for a variety
Trapping
Deviation from the normal change of an atmospheric property with altitude
form an additional barrier to air circulation. During a severe inversion, trapped air pollutants form a brownish haze that can cause respiratory problems
Inversion_(meteorology)
Cave-in and miner rescue in Atacama Region, Chile
men were trapped deep inside. A thick dust cloud caused by the rock fall blinded the miners for as much as six hours. Initially, the trapped miners tried
2010_Copiapó_mining_accident
Physical phenomenon
wave's transmission. Other types of surface wave are the trapped surface wave, the gliding wave and Dyakonov surface waves (DSW) propagating at the interface
Surface_wave
Plants that consume animals
Carabid beetle (Lebia grandis) trapped by Sarracenia purpurea Muscoid fly trapped by Dionaea muscipula Leaf beetle (Paria) trapped by Dionaea muscipula Limoniid
Carnivorous_plant
Region in spacetime from which nothing can escape
PMC 5253930. PMID 28163644. S2CID 16566181. Senovilla, José M. M. (2011). "Trapped surfaces". International Journal of Modern Physics D. 20 (11): 2139–2168. arXiv:1107
Event_horizon
Diagram used to represent quantum field theory calculations
quantization of areas: the operator of the area A of a two-dimensional surface Σ should have a discrete spectrum. Every spin network is an eigenstate
Spin_network
Extreme heat caused by a stationary high-pressure system
precipitation and keeping hot air "trapped" within a region. This can be caused by multiple factors, including sea surface temperature anomalies and the influence
Heat_dome
Genus of cephalopods
innovation unique to the genus. It is used as a brood chamber, and to trap surface air to maintain buoyancy. It was once speculated that argonauts did not
Argonaut_(animal)
Earthy smell when rain falls on dry soil
experiments using high-speed cameras found that raindrops striking porous surfaces can trap air bubbles, which rise and burst as aerosols, providing a mechanism
Petrichor
Subgenre of American hip-hop
2015, trap music once again surfaced to the top of mainstream music charts as New Jersey rapper Fetty Wap's hit single "Trap Queen" peaked at number two
Trap_music
Type of vacuum pump
molecular-weight gases can be trapped. Trapping nitrogen, helium, and hydrogen requires extremely low temperatures (~10K) and large surface area as described below
Cryopump
Concept in planetary sciences
layers of an adiabatic atmosphere. On airless bodies, the ices trapped inside cold-traps can potentially remain there for geologic time periods, allowing
Cold_trap_(astronomy)
Siege and mine deaths in South Africa in 2024
attempt to force illegal miners to come to the surface and be arrested. The blocking of key shaft exits trapped miners underground, with reports suggesting
Stilfontein_mine_deaths
Species of carnivorous plant
"sensitive hairs") on their inner surfaces. Additionally, when an insect or spider touches one of these hairs, the trap prepares to close, only fully enclosing
Venus_flytrap
Topics referred to by the same term
first-person shooter Star Wars Jedi Knight: Dark Forces II Marginally outer trapped surfaces - black hole boundaries in General Relativity Music of the Sun, an
MOTS
Device for trapping charged particles
uses a static electric field and static magnetic field. Paul traps are used in trapped ion quantum computers and realizing atomic clocks, including the
Ion_trap
Animals that feed by straining food from water
delay between closing the mouth and opening the gill flaps, plankton is trapped against the dermal denticles which line its gill plates and pharynx. This
Filter_feeder
Class of echinoderms
help keep the mucus stream in place. The total length of the food-trapping surface may be very large; the 56 arms of a Japanese sea lily, with 24 cm (9 in)
Crinoid
Quantum bit
motional states or alternatively the spin states of an electron trapped above the surface of liquid helium. The electron-on-helium qubit was proposed as
Electron-on-helium_qubit
Specialized field of wilderness rescue
years before cavers returned him to the surface in 1954. Neil Moss in Peak Cavern, England in 1959. Trapped in a narrow tunnel, he was suffocated by
Cave_rescue
Naturally-pressurized water source
groundwater to the surface without pumping because it is under pressure within a body of rock or sediment known as an aquifer. When trapped water in an aquifer
Artesian_well
Species of true bug
beneath their wing cases when they are on the surface as the oxygen is trapped by tiny hairs. They use trapped air in their physical gill to convert water-borne
Lesser_water_boatman
Trap for small animals
move across the terrain), or too large to be trapped (or large enough to escape if trapped). Trappability can also be affected by conditions such as temperature
Pitfall_trap
Floating buoy attached to a submarine
Once on the surface it can indicate to rescuers the position of the submarine, and may include a telephone for communication with the trapped submariners
Rescue_buoy_(submarine)
Plant flower structures
The structures of pollination traps can include deep tubular corollas with downward pointing hairs, slippery surfaces, adhesive liquid, attractants (often
Pollination_trap
men trapped 700 meters (2,300 ft) below ground who survived underground for a record 69 days. All 33 men were rescued and brought to the surface on 13
Health issues during the 2010 Copiapó mining accident
Health_issues_during_the_2010_Copiapó_mining_accident
2026 film by Renny Harlin
Zoey, Matt, Becky, and Cora’s stepbrother Finn are trapped in an air pocket. Swimming to the surface to find help, Matt encounters Cora and Finn’s father
Deep_Water_(2026_film)
Animal trap used to catch and kill mice
rodent to trip it; and the larger surface area of the trip increases the probability that the rodent will set off the trap. The exact latching mechanism holding
Mousetrap
1950 mining accident in Ayrshire, Scotland
flooded pit workings, trapping more than a hundred miners underground. For several days rescue teams worked non-stop to reach the trapped men. Most were eventually
Knockshinnoch_disaster
Optical trap for experimenting on small pieces of soft matter
in suspension. The forces used for trapping and deforming objects arise from photon momentum transfer on the surface of the objects, making the Optical
Optical_stretcher
Subsurface pool of hydrocarbons
until they either seep to the surface or are trapped by a non-permeable stratigraphic trap. They can be extracted from the trap by drilling. The largest natural
Petroleum_reservoir
Explosion of superheated ground water converting to steam
Hydrothermal explosions occur when superheated water trapped below the surface of the Earth rapidly converts from liquid to steam, violently disrupting
Hydrothermal_explosion
Device used to remotely catch aquatic animals
A fish trap is a trap used for catching fish and other aquatic animals of value. Fish traps include fishing weirs, cage traps, fish wheels and some fishing
Fish_trap
Swimming pool cleaning device
disturbed return water helps remove organic debris from the pool surface and directs it to be trapped within the back-dilution system for easy disposal. Some return
Pool_skimmer
Plumbing device
In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings
Trap_(plumbing)
Natural satellite orbiting Earth
the South, where water is trapped in permanently shadowed craters and crevices, allowing it to persist as ice on the surface since they are shielded from
Moon
2017 film by Mark Dennis
Time Trap is a 2017 science fiction action adventure film, directed by Ben Foster and Mark Dennis. Starring Brianne Howey, Cassidy Gifford, Olivia Draguicevich
Time_Trap_(film)
Branching shapes
negative charge, accumulating on the outer surfaces of the specimen. Under continued irradiation, the amount of trapped charge builds until the effective voltage
Lichtenberg_figure
6th episode of the 1st season of Fallout
"The Trap" is the sixth episode of the first season of the American post-apocalyptic drama television series Fallout. The episode was written by co-executive
The_Trap_(Fallout)
Object with escape velocity exceeding the speed of light
the same way as projectiles, any light emitted at the surface of a dark star would be trapped by the star's gravity, rendering it dark, hence the name
Dark star (Newtonian mechanics)
Dark_star_(Newtonian_mechanics)
Gas produced naturally within marshes, swamps and bogs
to form a crust that prevents oxygen from reaching the organic material trapped below. That is the condition that allows anaerobic digestion and fermentation
Marsh_gas
Geological structure allowing accumulation of hydrocarbons in a reservoir
the fault surface (such as clay) that also acts to prevent migration. This is known as clay smear. Stratigraphic trap In a stratigraphic trap, the geometry
Petroleum_trap
Infrastructure for draining excess rain and ground water from impervious surfaces
storm drain, storm sewer (United Kingdom, U.S. and Canada), highway drain, surface water drain/sewer (United Kingdom), or stormwater drain (Australia and
Storm_drain
Valve on the exterior of a ship's hull
open to the sea through flood ports. The trapped air in the tank provides positive buoyancy while on the surface, although sea water sloshing in through
Kingston_valve
18th episode of the 9th season of Family Guy
"It's a Trap!" is a direct-to-video special of the animated series Family Guy, which later served as the two-part season finale of the show's ninth season
It's_a_Trap!
Large contact lens resting on the sclera, creating a tear-filled vault over the cornea
order to ensure no bubbles become trapped under the lens after it is seated on the eye. If there is a bubble trapped then it is usually recommended to
Scleral_lens
2021 song from animated film Encanto
"Surface Pressure" is a song from Disney's 2021 animated musical film Encanto, released by Walt Disney Records as part of the film's soundtrack on November
Surface_Pressure
Organisms on the ocean's surface
Organisms that live freely at the ocean surface, termed neuston, include keystone organisms like the golden seaweed Sargassum that makes up the Sargasso
Ocean_surface_ecosystem
Zone of energetic charged particles around the planet Earth
David P. Stern and Mauricio Peredo Background: Trapped particle radiation models—Introduction to the trapped radiation belts by SPENVIS SPENVIS—Space Environment
Van_Allen_radiation_belt
Alternative model for black holes
bursts". arXiv:astro-ph/9803014. Mitra, Abhas (2000). "Non-occurrence of trapped surfaces and black holes in spherical gravitational collapse: An abridged version"
Magnetospheric eternally collapsing object
Magnetospheric_eternally_collapsing_object
Average temperature of the Earth's surface
Global surface temperature (GST) is the average temperature of Earth's surface at a given time. It is a combination of sea surface temperature and the
Global_surface_temperature
Asphalt pit or asphalt lake
an anticlinal trap. If there is a fault or fracture in the overlying strata above the oil reserve, the oil may migrate to the surface. This is possible
Tar_pit
Atomic physics technique to achieve high phase space densities
reach. Atoms trapped in optical or magnetic traps can be evaporatively cooled via two primary mechanisms, usually specific to the type of trap in question:
Evaporative cooling (atomic physics)
Evaporative_cooling_(atomic_physics)
Material trapped inside a mineral during formation
any material trapped inside a mineral during its formation. In gemology, it is an object enclosed within a gemstone or reaching its surface from the interior
Inclusion_(mineral)
Device used to monitor or reduce insect populations
type and funnel type. Light traps are widely used to survey nocturnal moths. Total species richness and abundance of trapped moths may be influenced by
Insect_trap
Use of magnetic fields to isolate particles or atoms
of the trapped atom. The chip shown is 2 cm x 2 cm; this size was chosen for ease in manufacture. In principle, the size of such microchip traps can be
Magnetic_trap_(atoms)
Hypersonic aircraft design
fuselage ended. Since the air was trapped between this sheet and the fuselage, a large volume of air would be trapped, much more than the more basic approach
Waverider
Large igneous province in India
The Deccan Traps are a large igneous province of west-central India (17–24°N, 73–74°E). They are one of the largest volcanic features on Earth, with lava
Deccan_Traps
Coal mine disaster in Illinois, US
feet below the surface of the surrounding prairie. Water poured into the mine and the main shaft was quickly inaccessible to the trapped miners. Since
1883_Diamond_Mine_Disaster
Transport truck fire in the Mont Blanc Tunnel
tunnel, it violently combusted. Other vehicles in the tunnel quickly became trapped and caught fire as firefighters could not reach the transport truck. 39
Mont_Blanc_Tunnel_fire
Presence of water on the Moon
lunar surface was generally assumed to be completely dry. However, a 2008 study of lunar rock samples revealed evidence of water molecules trapped in volcanic
Lunar_water
American cave explorer (1887–1925)
1887 – c. February 13, 1925) was an American cave explorer who became trapped and died in what became Mammoth Cave National Park. The incident earned
Floyd_Collins
Type of vacuum pump
Gasses are trapped by a combination of chemical reactions with the surface of the highly-reactive sputtered material, and being physically trapped underneath
Ion_pump
First planet from the Sun
rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars. The surface of Mercury is similar to Earth's Moon, being
Mercury_(planet)
Type of insect trap that uses pheromones to lure insects
insects enter through open sides and become adhered to the liner surface. Delta traps are commonly used for the capture of moth species in orchards and
Pheromone_trap
American rapper and singer-songwriter (1998–2018)
credit him for his musical versatility, with his music exploring emo, trap, trap metal, nu metal, indie rock, lo-fi, hip-hop, R&B, and punk rock. He was
XXXTentacion
Shooting range safety feature
A bullet trap (or pellet trap when used specifically for air guns) is a device to stop and collect projectiles fired at a shooting range to prevent overpenetrations
Bullet_trap
Closed cave in Utah
Retrieved September 29, 2023. Morgan, Emiley (November 26, 2009). "Man trapped in Utah County's Nutty Putty cave dies". Deseret News. Archived from the
Nutty_Putty_Cave
ESA/JAXA mission to study Mercury in orbit (2018–present)
characterization of its magnetic field, magnetosphere, and both interior and surface structure. In 2017 the spacecraft's cost was estimated at €1.65 billion
BepiColombo
2018 international rescue mission in Thailand
In June 2018, a junior football team became trapped in Tham Luang Nang Non, a cave system in Chiang Rai province, northern Thailand. Twelve members of
Tham_Luang_cave_rescue
Dwarf planet in the asteroid belt
surface are expected to end up in the traps, hopping an average of three times before escaping or being trapped. Dawn, the first spacecraft to orbit Ceres
Ceres_(dwarf_planet)
Minimization of heat transfer
paint – Type of paint in which can be used to coat a surface to reduce heat transfer Heat trap – Valves or loops of pipe on water heaters Removable insulation
Thermal_insulation
Automatic value for steam equipment
and sits on the surface of the condensate–steam interface. When there is no condensate, the actuator keeps the valve closed. When the trap is full of condensate
Steam_trap
Species of rodent
countries depend for protection from flooding. In those countries, it is trapped, poisoned, and hunted to attempt to keep the population down. Muskrats
Muskrat
Device that condenses specific vapors and gases
cold traps are necessary when removing large amounts of liquid as in freeze drying. Cold traps also refer to the application of cooled surfaces or baffles
Cold_trap
Red-colored seep of saltwater flowing from Taylor Glacier in Antarctica
The more soluble ferrous ions initially are dissolved in old seawater trapped in an ancient pocket remaining from the Antarctic Ocean when a fjord was
Blood_Falls
Trap designed to catch birds of prey
rodent or small bird, with a series of monofilament nooses attached to the surface to snare the legs of a free-flying raptor that attempts to take the bait
Bal-chatri
2019 British documentary film
when diver Chris Lemons had his excursion umbilical cable severed and was trapped around 100 metres (330 ft) under the sea without heat or light, and with
Last_Breath_(2019_film)
Scientific instruments
force of gravity. The trapped particles are usually micron-sized, or even smaller. Dielectric and absorbing particles can be trapped, too. Optical tweezers
Optical_tweezers
Construction term
pinhole) is a small hole in the surface of a concrete structure caused by the expansion and eventual outgassing of trapped pockets of air in setting concrete
Bughole
Region where Earth's magnetic field is weakest relative to an idealised dipole
where Earth's inner Van Allen radiation belt comes closest to Earth's surface, dipping down to an altitude of 200 kilometres (120 mi). This leads to
South_Atlantic_Anomaly
Equipment for catching crabs
bait, they cannot escape, and instead become immediately trapped. Once the crab becomes trapped and cannot leave the same way they entered, they float upward
Crab_trap
2005 film directed by Neil Marshall
office, as "people were still trapped underground in reality, so no one really wanted to go see a film about people trapped underground...". ...When it
The_Descent
Earth's most severe extinction event
impact of the North Atlantic Igneous Province and the Siberian Traps on the Earth-surface carbon cycle". Geological Magazine. 153 (2): 201–222. doi:10
Permian–Triassic extinction event
Permian–Triassic_extinction_event
Phenomenon in solid-state physics of semiconductors
trap levels: An electron in the conduction band can be trapped in an intragap state. An electron can be emitted into the conduction band from a trap level
Carrier generation and recombination
Carrier_generation_and_recombination
State of matter
and electrons are trapped in Larmor orbits by the magnetic field), partially magnetized (the electrons but not the ions are trapped by the magnetic field)
Plasma_(physics)
2006 mining accident in Tasmania, Australia
were rescued on 9 May 2006, two weeks after being trapped nearly 1 kilometre (0.62 mi) below the surface. At 9:26 p.m. (Australian Eastern Standard Time)
Beaconsfield_Mine_collapse
Instrument used in oceanography to measure the quantity of sinking particulate material
within the surface euphotic zone, and is of interest to scientists studying the role of the biological pump in the carbon cycle. Sediments traps normally
Sediment_trap
Species of marine cnidarian
on the surface of the water. A gas-filled bladder called the pneumatophore provides buoyancy that lets the animal stay afloat on the surface of the water
Portuguese_man_o'_war
Very large volume eruption of basalt lava
hotspot reaching the surface of the Earth via a mantle plume. Flood basalt provinces such as the Deccan Traps of India are often called traps, after the Swedish
Flood_basalt
2020 Swedish film
Breaking Surface is a 2020 Swedish Norwegian Belgian survival thriller drama film written and directed by Joachim Hedén [sv] and starring Moa Gammel Ginsburg
Breaking_Surface
2026 British film
Caitlin FitzGerald and Hero Fiennes Tiffin in a story about three astronauts trapped in their capsule as it sinks in the ocean. In this tense thriller, three
Above_the_Below
Water that does not flow
swamp, lake, lagoon, river, etc.) Surface and ground water stagnation Trapped water stagnation. The water may be trapped in human artifacts (discarded cans
Water_stagnation
Sliding or hinged door that is flush with the surface of a floor, ceiling, or roof
A trapdoor or hatch is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. It is traditionally small in size. It was
Trapdoor
1996 American film
14-year-old daughter who is trapped alongside her distanced parents in the tunnel Trina McGee as Latonya, a female juvenile delinquent trapped along with other trouble
Daylight_(1996_film)
TRAPPED SURFACE
TRAPPED SURFACE
Boy/Male
Arabic, Muslim
Wrapped
Boy/Male
Muslim/Islamic
Wrapped
Boy/Male
Muslim
Wrapped in, Enveloped
Surname or Lastname
English and German
English and German : occupational name for a wine merchant or tavernkeeper, Middle English tapper (an agent derivative of tappen ‘to draw off’), Low German tappe ‘tap’.North German : nickname from Middle Low German tapper ‘capable’, ‘eager’, ‘courageous’.Swedish : soldier’s name from tapper ‘brave’.
Boy/Male
Muslim
Trained
Boy/Male
Biblical
Wrapped up, hidden, covered, myrrh, rosin.
Boy/Male
Arabic, Muslim
Wrapped in; Enveloped; Attribute of the Prophet Muhammad
Boy/Male
Arabic, Australian, Muslim
Wrapped
Girl/Female
American, Australian, British, English
Soft-napped Fabric
Boy/Male
American, Anglo, British, English
Game Warden; Falcon Trainer; Bird Trapper
Boy/Male
Australian, Biblical, Finnish, German
Dedicated; Disciplined; Experienced; Trained
Surname or Lastname
English
English : metonymic occupational name for a trapper, from a derivative of Middle English trapp ‘trap’.German : nickname for a stupid person, from Middle High German trappe ‘bustard’ (of Slavic origin).German : topographic name for someone living by a step-like feature in the terrain, from Middle Low German treppe, trappe ‘step’, or by a flight of steps, standard German Treppe.Thomas Trapp (b. 1635) was in Edgartown, Martha’s Vineyard, MA, by 1659. He or his family probably came originally from Great Baddow, Essex, England.
Surname or Lastname
English
English : variant of Tripp.
Boy/Male
Muslim/Islamic
The wrapped one
Boy/Male
Muslim
The wrapped one
Boy/Male
Indian
The wrapped one
Boy/Male
Indian
Wrapped in, Enveloped
Boy/Male
Indian
Trained
Surname or Lastname
German
German : metonymic occupational name for the owner of a tavern or a nickname for a drinker, from Low German tappe ‘tap’.German : variant of Tapp.English : variant spelling of Tapp.
Boy/Male
British, English
Traveler
TRAPPED SURFACE
TRAPPED SURFACE
Male
Swedish
Norwegian and Swedish form of Scandinavian Olaf, OLA means "heir of the ancestors."
Boy/Male
Hindu, Indian, Tamil
Full of Happiness
Girl/Female
Hindu
Witness
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Tamil, Telugu
Most Beautiful Eyes; One with Attractive Eyes
Boy/Male
Tamil
Name of Goddess Lakshmi
Boy/Male
Hindu, Indian, Punjabi, Sikh, Traditional
God's Shelter
Surname or Lastname
German
German : nickname for a violent, aggressive person, from Middle High German buf ‘push’, ‘shove’.German : from the Old German personal name Bodo or the compound name Bodefrit, containing the Old High German element buitan ‘to bid or order’ or boto ‘messenger’.English : of uncertain derivation; possibly a nickname, either variant of Boff 1, or alternatively from Old French buf(f)e ‘blow’, ‘slap in the face’. Compare Buffin.
Girl/Female
Tamil
Navthetchika | நாவà¯à®¤à¯‡à®¤à¯à®šà®¿à®•à®¾Â
Girl/Female
American, British, English, Greek, Irish
Pure; Combination of Kate and Lynne
Girl/Female
Bengali, Indian
Daughter of God
TRAPPED SURFACE
TRAPPED SURFACE
TRAPPED SURFACE
TRAPPED SURFACE
TRAPPED SURFACE
n.
A boy who opens and shuts a trapdoor in a gallery or level.
n.
That in which anything is wrapped, or inclosed; envelope; covering.
a.
Covered or wrapped in flannel.
a.
Not trained.
n.
One who traps animals; one who makes a business of trapping animals for their furs.
imp. & p. p.
of Tap
imp. & p. p.
of Tramp
a.
Having clouds resting on the top or head; reaching to the clouds; as, cloud-capped mountains.
imp. & p. p.
of Trap
imp. & p. p.
of Strap
n.
Specifically, a loose outer garment; an article of dress intended to be wrapped round the person; as, a morning wrapper; a gentleman's wrapper.
imp. & p. p.
of Wrap
imp. & p. p.
of Frap
p. a.
Wrapped; covered; cloaked.
imp. & p. p.
of Trip
n.
A wrapper.
a.
Having the top capped or covered with snow; as, snow-capped mountains.
a.
Confined; cramped.