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. What is the term for the region around a black hole where tidal forces are strong enough to tear apart objects? a) Accretion Disk b) Photon Sphere c) Ergosphere d) Roche Limit 2 / 30 2. Who first predicted the existence of black holes? a) Isaac Newton b) Albert Einstein c) John Michell d) Stephen Hawking 3 / 30 3. What is the firewall paradox, a challenge to our understanding of black holes? a) The paradox suggesting that black holes emit a firewall of radiation b) The paradox concerning the sudden disappearance of black hole event horizons c) The paradox involving inconsistencies between classical and quantum descriptions of black holes d) The paradox related to the existence of exotic matter near black holes 4 / 30 4. What is one challenge in confirming the existence of primordial black holes? a) Their rapid movement through space b) Their high visibility in the electromagnetic spectrum c) Their very small size or very large mass d) Their lack of gravitational influence 5 / 30 5. What aspect of the universe will the James Webb Space Telescope (JWST) primarily focus on studying? a) Dark matter and dark energy b) Exoplanets and habitability c) Active galactic nuclei and black holes d) The early universe and the formation of galaxies 6 / 30 6. Which theory of physics is primarily used to describe black holes? a) Quantum Mechanics b) General Relativity c) Classical Mechanics d) Thermodynamics 7 / 30 7. What mass range defines a stellar-mass black hole? a) 0.5 to 1 solar masses b) 1 to 3 solar masses c) 3 to 20 solar masses d) 20 to 100 solar masses 8 / 30 8. What is one method through which supermassive black holes are believed to grow? a) By forming new stars b) By absorbing dark matter c) By merging with other black holes and accreting matter d) By fusing hydrogen atoms 9 / 30 9. What is the event horizon of a black hole often referred to as? a) Point of no return b) Singularity c) Photon sphere d) Accretion disk 10 / 30 10. What phenomenon occurs when a black hole absorbs a nearby star or gas cloud, causing a sudden increase in brightness observed from Earth? a) Stellar explosion b) Supernova c) Gamma-ray burst d) Tidal disruption event 11 / 30 11. What typically triggers a Type Ia supernova? a) The collapse of a massive star b) The merger of two neutron stars c) The accretion of matter onto a white dwarf from a companion star d) The explosion of a red giant 12 / 30 12. 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 13 / 30 13. What significant finding was reported in the research paper titled "Observational Evidence for Intermediate-mass Black Holes" by Sean Farrell et al., published in 2009? a) Discovery of a population of primordial black holes b) Measurement of the spin of a supermassive black hole using X-ray emissions c) Detection of gravitational waves from a binary black hole merger d) Evidence for the existence of intermediate-mass black holes in globular clusters 14 / 30 14. What significant concept was introduced in the research paper titled "The No-Hair Theorem in General Relativity" by Brandon Carter, published in 1971? a) The concept of black hole complementarity b) The existence of gravitational waves c) The idea that black holes can emit radiation d) The no-hair theorem, stating that black holes have only three observable properties: mass, charge, and angular momentum 15 / 30 15. What fundamental principle of quantum mechanics does the information paradox challenge? a) The uncertainty principle b) The conservation of energy c) The unitarity of quantum mechanics d) The principle of superposition 16 / 30 16. 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 17 / 30 17. 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 18 / 30 18. What was the first black hole to be discovered and confirmed through observational evidence? a) Cygnus X-1 b) M87's Supermassive Black Hole c) Sagittarius A* d) V404 Cygni 19 / 30 19. What is the term used to describe the stretching and elongation of an object as it approaches the event horizon of a black hole? a) Time dilation b) Gravitational lensing c) Black hole evaporation d) Spaghettification 20 / 30 20. Which theoretical concept suggests that information escaping from a black hole is encoded in Hawking Radiation? a) No-hair theorem b) String theory c) Loop quantum gravity d) Fuzzball theory 21 / 30 21. What is the Schwarzschild radius? a) The distance from a black hole where time dilation occurs b) The radius of a black hole's event horizon c) The distance light can travel around a black hole d) The radius of the observable universe 22 / 30 22. What is the name of the black hole system that produced the first-ever observed gravitational waves, detected in 2015? a) Cygnus X-1 b) V404 Cygni c) GW170817 d) GW150914 23 / 30 23. What is the main reason for placing the James Webb Space Telescope (JWST) at Lagrange Point 2 (L2)? a) To provide a vantage point for observing the entire sky b) To avoid interference from Earth's atmosphere and thermal radiation c) To facilitate communication with ground control stations d) To minimize the risk of collision with space debris 24 / 30 24. What is the significance of studying black holes using multiple wavelengths, including X-rays, radio waves, and visible light? a) It allows for the direct observation of black holes b) It provides a comprehensive view of black hole environments and processes c) It enables the detection of gravitational waves from black hole mergers d) It helps measure the mass of black holes accurately 25 / 30 25. What mass range defines an intermediate-mass black hole? a) 10 to 100 solar masses b) 100 to 10,000 solar masses c) 1,000 to 100,000 solar masses d) 10,000 to 1 million solar masses 26 / 30 26. What effect does the gravitational redshift have on light emitted from near a black hole? a) It shifts the light toward the blue end of the spectrum b) It shifts the light toward the red end of the spectrum c) It increases the intensity of the light d) It polarizes the light 27 / 30 27. 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 28 / 30 28. Why are primordial black holes an important area of research in cosmology? a) They are the main source of cosmic rays b) They may offer explanations for the nature of dark matter c) They are the most common type of black hole d) They directly influence the orbits of planets 29 / 30 29. What is the initial stage of a star's life cycle? a) Red Giant b) Main Sequence c) Nebula d) White Dwarf 30 / 30 30. What prediction of general relativity has been confirmed by the observation of black hole mergers? a) The existence of dark energy b) The bending of light c) The emission of gravitational waves d) The expansion of the universe Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! 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