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Black hole: Quiz


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Question 1: The first strong candidate for a black hole, ________, was discovered in this way by Webster and Murdin[68] and Bolton[69] in 1972.
Cygnus X-1SupernovaBinary starSun

Question 2: In particular, active galactic nuclei and ________ are thought to be the accretion discs of supermassive black holes.

Question 3: Observations have been made of weak gravitational lensing, in which photons are deflected by only a few ________.
LatitudeLongitudeMinute of arcAngle

Question 4: For decades, astronomers have used the term "________" to describe galaxies with unusual characteristics, such as unusual spectral line emission and very strong radio emission.
QuasarBlazarRadio galaxyActive galactic nucleus

Question 5: [43] It also appears to be possible to follow closed timelike curves around the Kerr singularity, which lead to problems with causality like the ________.
Time travelOntological paradoxNovikov self-consistency principleGrandfather paradox

Question 6: Some of the most notable galaxies with supermassive black hole candidates include the ________, M32, M87, NGC 3115, NGC 3377, NGC 4258, and the Sombrero Galaxy.
Orion NebulaTriangulum GalaxyAndromeda GalaxyMessier 81

Question 7: In 1930, astrophysicist Subrahmanyan Chandrasekhar calculated, using general relativity, that a non-rotating body of electron-degenerate matter above 1.44 solar masses (the ________) would collapse.
Chandrasekhar limitType II supernovaNeutron starWhite dwarf

Question 8: [citation needed] In recent years, much attention has been drawn by the fuzzball model in ________.
Superstring theoryString theoryM-theoryD-brane

Question 9: This is far less than the 2.7 K produced by the ________.
Sunyaev-Zel'dovich effectAtacama Cosmology TelescopeVery Small ArrayCosmic microwave background radiation

Question 10: [citation needed] This allows the formulation of the first law of black hole mechanics as an analogue of the ________, with the mass acting as energy, the surface gravity as temperature and the area as entropy.
Conservation of energySecond law of thermodynamicsLaws of thermodynamicsFirst law of thermodynamics

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