Home» Online Test » Astronomy » Black Hole Online Test 0% Sorry, time's up. To complete the online test, please restart it. Created by Vikash chaudhary This 'Black Hole Online Test' covers questions across all the topics related to the Black Holes. Get New Questions in Each Attempt Total Questions: 30 Time Allotted: 30 minutes Passing Score: 50% Randomization: Yes Certificate: Yes Do not refresh the page! 👍 All the best! 1 / 30 1. Who formulated the theory of general relativity, which provides the foundation for understanding black holes? a) Isaac Newton b) Albert Einstein c) Galileo Galilei d) Stephen Hawking 2 / 30 2. What is the current status of Hawking Radiation and black hole evaporation in theoretical physics? a) It has been proven experimentally b) It remains a theoretical prediction c) It has been disproven by observational evidence d) It is considered irrelevant to modern physics 3 / 30 3. What is the no-hair theorem in the context of black holes? a) The theorem stating that black holes have no gravitational effect on nearby objects b) The theorem asserting that black holes have no distinguishing features other than mass, charge, and angular momentum c) The theorem proving that black holes cannot evaporate d) The theorem demonstrating that black holes cannot merge with other black holes 4 / 30 4. What is the approximate Schwarzschild radius of a black hole with a mass equal to that of the Sun? a) 3 kilometers b) 30 kilometers c) 300 kilometers d) 3,000 kilometers 5 / 30 5. What theoretical concept suggests that black holes may be replaced by fuzzballs, eliminating the need for an event horizon? a) No-hair theorem b) Fuzzball theory c) Holographic principle d) Firewall paradox 6 / 30 6. What defines a supermassive black hole? a) A black hole with mass greater than 20 solar masses b) A black hole with mass between 20 and 100 solar masses c) A black hole with mass greater than 100,000 solar masses d) A black hole with mass greater than 1 million solar masses 7 / 30 7. What is the relationship between the mass of a black hole and its Schwarzschild radius? a) Directly proportional b) Inversely proportional c) Exponential d) Logarithmic 8 / 30 8. What is the theoretical temperature of a black hole's event horizon, as predicted by Hawking radiation? a) Absolute zero b) Planck temperature c) Infinity d) Depends on the mass of the black hole 9 / 30 9. What is the estimated mass of Cygnus X-1, the first confirmed black hole? a) 3 solar masses b) 10 solar masses c) 15 solar masses d) 30 solar masses 10 / 30 10. What is the singularity in the context of black holes according to general relativity? a) The outer edge of the black hole b) A region of infinite density c) The point where time stops d) The area of maximum light emission 11 / 30 11. What is the fate of a star much more massive than the Sun after it exhausts its nuclear fuel? a) It becomes a red giant b) It forms a white dwarf c) It collapses into a black hole d) It turns into a brown dwarf 12 / 30 12. What is the name of the mission launched by NASA to study X-ray emissions from black holes, neutron stars, and other high-energy phenomena? a) Hubble Space Telescope b) Chandra X-ray Observatory c) Fermi Gamma-ray Space Telescope d) Spitzer Space Telescope 13 / 30 13. Which observable phenomena are often associated with stellar-mass black holes? a) Solar flares b) Gamma-ray bursts c) Pulsar emissions d) Planetary transits 14 / 30 14. What is the approximate mass of the supermassive black hole in the galaxy M87, as observed by the Event Horizon Telescope? a) 1 million solar masses b) 6.5 million solar masses c) 6.5 billion solar masses d) 100 million solar masses 15 / 30 15. What phenomenon occurs when light from distant objects is bent by the gravitational field of a black hole, allowing astronomers to measure the black hole's mass indirectly? a) Gravitational lensing b) Doppler effect c) Redshift d) Time dilation 16 / 30 16. What is the name of the observatory that made the first direct detection of gravitational waves from a black hole merger? a) Hubble Space Telescope b) Chandra X-ray Observatory c) Laser Interferometer Gravitational-Wave Observatory (LIGO) d) Very Large Telescope (VLT) 17 / 30 17. Which research paper, published in 2019, described the discovery of the first-ever intermediate-mass black hole candidate in the Milky Way galaxy? a) "First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole" b) "Observation of Gravitational Waves from a Binary Black Hole Merger" c) "Discovery of an Intermediate-mass Black Hole Candidate in the Galactic Center Region" d) "Measurement of Gravitational Waves from a Binary Neutron Star Merger" 18 / 30 18. What process leads to the formation of a stellar-mass black hole? a) The collapse of a white dwarf b) The collision of two neutron stars c) The supernova explosion of a massive star d) The fusion of hydrogen atoms 19 / 30 19. What ongoing challenge do theoretical physicists face in resolving the information paradox and understanding the true nature of black holes? a) Experimentally testing predictions of black hole evaporation b) Identifying observable signatures of exotic matter near black holes c) Reconciling quantum mechanics with general relativity d) Explaining the existence of supermassive black holes in the early universe 20 / 30 20. Which method involves looking for X-ray emissions to identify potential intermediate-mass black holes? a) X-ray spectral analysis b) Radio wave observations c) Infrared spectroscopy d) Ultraviolet imaging 21 / 30 21. What is an accretion disk, commonly seen around black holes? a) A disk-shaped cloud of gas and dust orbiting a black hole b) A region of intense magnetic fields near a black hole c) A zone of extreme radiation emitted by a black hole d) A sphere of dark matter surrounding a black hole 22 / 30 22. What is the final evolutionary stage of a low-mass star? a) Black hole b) Neutron star c) White dwarf d) Red supergiant 23 / 30 23. What is the name of the point of no return around a black hole, beyond which escape is impossible? a) Event Horizon b) Singularity c) Photon Sphere d) Gravitational Field 24 / 30 24. What is one potential method for detecting intermediate-mass black holes? a) Observing their direct emissions b) Detecting gravitational waves from their mergers c) Measuring the cosmic microwave background d) Observing star formation rates 25 / 30 25. What is the name of the method used to measure the mass of a black hole by observing the Doppler shifts in the spectral lines of stars or gas orbiting around it? a) Gravitational lensing b) X-ray spectroscopy c) Doppler tomography d) Radial velocity method 26 / 30 26. What type of black holes were discovered by astronomers in 2019, challenging previous models of black hole formation? a) Primordial black holes b) Intermediate-mass black holes c) Supermassive black holes d) Stellar-mass black holes 27 / 30 27. How is the size of a black hole’s event horizon measured? a) By its radius b) By its volume c) By its circumference d) By its mass 28 / 30 28. Which of the following is a property that black holes can possess? a) Mass b) Charge c) Angular Momentum d) All of the above 29 / 30 29. Which theory of physics is primarily used to describe black holes? a) Quantum Mechanics b) General Relativity c) Classical Mechanics d) Thermodynamics 30 / 30 30. What is the concept known as where an object falling into a black hole appears to an outside observer to become frozen in time and redshifted to infinity? a) Time dilation b) Gravitational lensing c) Black hole evaporation d) Spaghettification Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. 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