Scientists presently have two theories on how the first supermassive black holes formed: one theory suggests black holes formed from a collapsing star and grew over time; the second theory suggests the collapse of large clouds of gases caused supermassive black holes to form immediately. The recent discovery of a supermassive black hole, UHZ1, supports the second theory. According to scientists, the energy emitted from the black hole suggests that, in its early days, the black hole already weighed as much as all the stars in its galaxy. Which finding, if true, would most directly weaken the second theory described in the passage?The discovery of a supermassive blackhole that had a comparatively small mass in its early dayseliminateThe discovery of a collapsing star in a galaxy millions of light years awayeliminateThe observation of a large cloud of gas collapsing and forming into a black holeeliminateThe emergence of new data suggesting that the size of blackholes is best measured through the use of x-rays
Question
Scientists presently have two theories on how the first supermassive black holes formed: one theory suggests black holes formed from a collapsing star and grew over time; the second theory suggests the collapse of large clouds of gases caused supermassive black holes to form immediately. The recent discovery of a supermassive black hole, UHZ1, supports the second theory. According to scientists, the energy emitted from the black hole suggests that, in its early days, the black hole already weighed as much as all the stars in its galaxy. Which finding, if true, would most directly weaken the second theory described in the passage?The discovery of a supermassive blackhole that had a comparatively small mass in its early dayseliminateThe discovery of a collapsing star in a galaxy millions of light years awayeliminateThe observation of a large cloud of gas collapsing and forming into a black holeeliminateThe emergence of new data suggesting that the size of blackholes is best measured through the use of x-rays
Solution
The finding that would most directly weaken the second theory described in the passage is the discovery of a supermassive black hole that had a comparatively small mass in its early days. This is because the second theory suggests that supermassive black holes form immediately from the collapse of large clouds of gases, implying a large mass from the start. If a supermassive black hole was found to have a small mass in its early days, it would contradict this theory.
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The ‘Black Hole’ theory waspropounded by
Dark matter is a little-understood form of matter composed of particles that do not absorb, reflect, or emit light. Recently, physicists have revived the idea that dark matter is actually formed from the remains of primordial black holes created during the Big Bang. This claim was echoed by researchers in a 2017 paper who used mathematical models to estimate the characteristics, size, and location of primordial black holes. Which finding, if true, would most directly support the physicists' claim?Primordial black holes are estimated to have been too small to account for all the dark matter theorized to exist in the universe.eliminateExcess infra-red radiation that has been detected in the universe is found to be attributable to primordial black holes.eliminateThe theorized arrangement of dark matter is found to match the theorized arrangement of primordial black holes.eliminateEvidence emerges that suggests that primordial black holes grew into the supermassive black holes that are observable in the universe today.
The ‘Black Hole’ theory waspropounded by [UPPCS (Mains) 2016UPPCS (Pre) 1996](A) C.V. Raman(B) H.J. Bhabha(C) S. Chandrashekhar(D) Hargovind Khurana8. A ‘black hole’ is a body in spacewhich does not allow any typeof radiation to come out. Thisproperty is due to its [IAS (Pre) 2000](A) Very small size(B) Very large size(C) High density(D) Very low density9. The terms ‘Event Horizon’,‘Singularity’, ‘String Theory’ and‘Standard Model’ are sometimesseen in the news in the context of[IAS (Pre) 2017](A) Observation and understandingof the Universe(B) Study of the solar and the lunareclipses(C) Placing satellites in the orbit ofthe Earth(D) Origin and evolution of livingorganisms on the Earth10. ‘Super Nova’ is[UP Lower Sub. (Mains) 2015](A) An asteroid (B) A black hole(C) A comet (D) A dyning star11. How many constellations are in ourSpace? [44th BPSC (Pre) 2000](A) 87 (B) 88(C) 89 (D) 9012. Which one of the following is not anAstronomical object?[UPPCS (Pre) 1996IAS (Pre) 1993](A) Pulsar (B) Brittle star(C) Black hole (D) Quasar13. A group of stars arranged in aparticular shape, is called[UPPCS (Pre) 2013](A) Milky Way (B) Constellation(C) Andromeda (D) Solar system
What event is believed to create elements heavier than iron?a supernova explosionthe formation of a neutron star the accretion of matter into a black holea nova outburst
Which statement about black holes is true?Group of answer choicesThey form from 1.4 solar mass stars.Their escape velocity is greater than the speed of light.Their event horizon is a physical surface boundary.Their main sequence mass was 1-3 solar masses.
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