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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
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
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
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)
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
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
Plants that consume animals
confusaria) trapped by Drosera filiformis Horse fly (Tabanus) trapped by Drosera filiformis Red-eyed vinegar fly (Drosophila melanogaster) fly trapped by Drosera
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
Earthquake in Japan
for possible people still trapped on 31 July. The Kumamoto Prefectural Police said on 30 July that all known individuals trapped in the building had been
2026_Kumamoto_earthquake
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
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
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)
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
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
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
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
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
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
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)
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
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
{RP} ^{3}} geon ). These conditions are: 1) the existence of an inner trapped surface (i.e. radial null geodesics directed inward from region I toward region
Topological_censorship
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
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
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
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’s father, but they
Deep_Water_(2026_film)
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
Animal trap used to catch and kill mice
usually empty, allowing the mouse to live but keeping it trapped until the owner of the trap can release them. Another design uses a bowl (or similar
Mousetrap
2017 film by Johannes Roberts
cage breaks and the cage plummets to the ocean floor with the two girls trapped inside, they must find a way to escape, with their air supplies running
47_Meters_Down
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
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
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
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
Animals that feed by straining food from water
theory implies that only particles as big as the mesh of the sieve can be trapped. In 1905, H. Wallengren proposed an alternative theory, that sticky limbs
Filter_feeder
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
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
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
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
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
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
Surface of synthetic fibers made to look like natural grass
Artificial turf is a surface of synthetic fibers made to look like natural grass, used in sports arenas, residential lawns, and commercial applications
Artificial_turf
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
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!
Largest moon of Jupiter
oxygen atmosphere comes from spectral detection of gases trapped in the ice at the surface of Ganymede. The detection of ozone (O3) bands was announced
Ganymede_(moon)
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
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)
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
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
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
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
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
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
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)
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
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
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)
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
2002 rescue operation in Pennsylvania, US
rescue took place in Somerset County, Pennsylvania, when nine miners were trapped underground for over 77 hours, from July 24 to 28, 2002. All nine miners
Quecreek_Mine_rescue
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
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
sacrifices herself to trap Lucifer in the alternate reality known as Apocalypse World, trapping herself with him. In season 13, Mary is trapped in Apocalypse
List of Supernatural and The Winchesters characters
List_of_Supernatural_and_The_Winchesters_characters
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
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
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
Semiconductor memory technology
creates holes that are trapped locally some of which recombine with electrons to remove the charge from that end of the charge trap. The MirrorBit read is
Charge_trap_flash
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
Gothic castle in the Czech Republic
castle to cover one of the gateways to Hell, built to prevent demons (trapped in lower levels) from reaching the rest of the world. Houska Castle was
Houska_Castle
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
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
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)
that molecules are trapped on surfaces and adsorb chemically. From Langmuir's adsorption isotherm, molecules cannot adsorb on surfaces when the adsorption
Sticking_probability
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
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
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
Position of the body used for sexual activities
penetrating partner can stand if the receiving partner is on a raised surface. The receiving partner lies facing down in prone position, possibly with
Sex_position
Predatory hornet, largest in the world
Bellingham, Washington, 24 km (15 mi) south of Custer. An unmated queen was trapped in July 2020, near Birch Bay, Washington, 10 km (6 mi) west of Custer.
Asian_giant_hornet
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)
Type of hydrocarbon reservoir
land or on the sea floor. The rest remains trapped underground by geological barriers in a variety of trap geometries. In this way, underground pockets
Unconventional (oil and gas) reservoir
Unconventional_(oil_and_gas)_reservoir
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)
2023 video game
the latter's memory. She reveals that her consciousness has also been trapped in Limbo, which was designed by Sechenov to house the minds of those using
Atomic_Heart
1986 video game
Following a nuclear war, humanity is trapped underground by a robot defence system that rules the irradiated surface. Your character assumes control of
Cholo_(video_game)
Elongated mineral formation hanging down from a cave ceiling
the roof of a lava tube is cooling, a skin forms that traps semi-molten material inside. Trapped gases expansion forces lava to extrude out through small
Stalactite
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)
Lake in Lombardy, Italy
quality of life for inhabitants, leading to reports of residents feeling trapped in their homes during busy weekends and essential services like schools
Lake_Como
Earthquake impacting Myanmar and Thailand
found alive but trapped within the rubble of the State Audit Office building site in Chatuchak district. Many of the workers trapped were believed to
2025_Myanmar_earthquake
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
2015 film by Patricia Riggen
in which 33 miners were trapped inside the San José Mine in Chile for 69 days. The film stars Antonio Banderas as trapped miner Mario Sepúlveda. It
The_33
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
Symptoms resulting from chronic, direct pressure on a peripheral nerve
direct pressure on a peripheral nerve. It is known colloquially as a trapped nerve, though this may also refer to nerve root compression (by a herniated
Nerve_compression_syndrome
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)
Computer hardware technology that uses quantum mechanics
approach using topological states such as anyons. Trapped-ion quantum computer — approach using trapped charged atoms as qubits. D-Wave Systems – Quantum
Quantum_computing
1981 West German war film
military training and leadership for the High Command. When the boat is trapped underwater near Gibraltar, he becomes pessimistic and begins to let go
Das_Boot
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)
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
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
Electromagnetic radiation humans can see
surface that is ahead during the motion (front surface) than on the back surface. The backwardacting force of pressure exerted on the front surface is
Light
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
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