Black Hole Online Test

Created by

Vikash chaudhary

This 'Black Hole Online Test' covers questions across all the topics related to the Black Holes.

Get fresh, new questions in each attempt.

Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
Randomization: Yes
Certificate: Yes
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1 / 30

1. During which stage does a star spend the majority of its life?

a) Red Giant

b) Main Sequence

c) Supernova

d) Black Hole

2 / 30

2. What is Hawking Radiation?

a) Light emitted from the event horizon

b) Thermal radiation predicted to be released by black holes

c) Sound waves detected from black holes

d) The shadow cast by a black hole

3 / 30

3. What type of star is formed after a supernova explosion if the core remnant is between 1.4 and 3 solar masses?

a) White Dwarf

b) Neutron Star

c) Red Giant

d) Black Hole

4 / 30

4. What defines the Chandrasekhar limit?

a) The maximum mass of a neutron star

b) The maximum mass of a stable white dwarf

c) The minimum mass required to form a black hole

d) The minimum mass required for nuclear fusion

5 / 30

5. What is the estimated mass of Sagittarius A*, the supermassive black hole at the center of the Milky Way?

a) 10,000 solar masses

b) 100,000 solar masses

c) 1 million solar masses

d) 4 million solar masses

6 / 30

6. How do astronomers detect supermassive black holes in distant galaxies?

a) By observing visible light emissions

b) By tracking the motion of stars and gas clouds near the galaxy center

c) By detecting gamma-ray bursts

d) By measuring cosmic microwave background radiation

7 / 30

7. 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

8 / 30

8. What property of a black hole is inferred from the observation of its X-ray emissions?

a) Spin

b) Charge

c) Temperature

d) Mass accretion rate

9 / 30

9. What is a white dwarf primarily composed of?

a) Hydrogen and helium

b) Iron and nickel

c) Carbon and oxygen

d) Silicon and sulfur

10 / 30

10. What size range can primordial black holes have?

a) Between 1 and 10 solar masses

b) Between 10 and 100 solar masses

c) Between 100 and 1,000 solar masses

d) From microscopic to several thousand solar masses

11 / 30

11. What happens to the gravitational pull of a black hole as an object approaches its event horizon?

a) The gravitational pull weakens

b) The gravitational pull remains constant

c) The gravitational pull increases

d) The gravitational pull fluctuates unpredictably

12 / 30

12. Which research paper, published in 2016, described the discovery of the gravitational waves from a binary black hole merger, providing direct evidence for the existence of gravitational waves predicted by Einstein's theory of general relativity?

a) "First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole"

b) "Measurement of Gravitational Waves from a Binary Black Hole Merger"

c) "The Information Paradox"

d) "Particle Creation by Black Holes"

13 / 30

13. What recent discovery provided evidence for the existence of a population of "intermediate-mass" black holes in star clusters?

a) X-ray emissions from an ultraluminous X-ray source

b) Detection of gravitational waves from a black hole merger

c) Observation of hypervelocity stars escaping a galactic center

d) Imaging of a black hole shadow using the Event Horizon Telescope

14 / 30

14. What is one advantage of studying black holes using X-ray emissions compared to other wavelengths?

a) X-rays can penetrate interstellar dust more easily

b) X-rays travel faster than other types of radiation

c) X-rays are less affected by gravitational lensing

d) X-rays provide higher resolution images

15 / 30

15. What property of a black hole is responsible for determining the curvature of spacetime around it?

a) Temperature

b) Charge

c) Spin

d) Mass

16 / 30

16. What property of black hole mergers allows scientists to observe them using gravitational wave detectors?

a) Their bright visible light emissions

b) Their strong X-ray emissions

c) Their rapid expansion

d) Their distortion of spacetime

17 / 30

17. 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

18 / 30

18. Which type of black hole is the smallest?

a) Supermassive Black Hole

b) Stellar Black Hole

c) Intermediate Black Hole

d) Primordial Black Hole

19 / 30

19. What evidence do astronomers use to detect stellar-mass black holes in binary systems?

a) Direct imaging of the black hole

b) Gravitational lensing

c) X-ray emissions from the accretion disk

d) Pulsar timing

20 / 30

20. What is the name of the supermassive black hole at the center of the Milky Way galaxy?

a) Andromeda

b) Sagittarius A*

c) Cygnus X-1

d) M87*

21 / 30

21. What is the name of the boundary around a black hole beyond which nothing can escape, as predicted by general relativity?

a) Event Horizon

b) Singularity

c) Photon Sphere

d) Accretion Disk

22 / 30

22. Which space telescope provided the first direct image of a supermassive black hole's event horizon?

a) Hubble Space Telescope

b) Chandra X-ray Observatory

c) James Webb Space Telescope

d) Event Horizon Telescope

23 / 30

23. What is one challenge in confirming the existence of intermediate-mass black holes?

a) Their strong visible light emissions

b) Their large distances from Earth

c) Their relatively low luminosity compared to supermassive black holes

d) Their rapid motion through space

24 / 30

24. Which concept describes the warping of space and time by gravity in Einstein's theory?

a) Quantum entanglement

b) Special relativity

c) Spacetime curvature

d) Gravitational lensing

25 / 30

25. What is the mass of M87's Supermassive Black Hole, as estimated from the 2019 EHT image?

a) 1 million solar masses

b) 10 million solar masses

c) 100 million solar masses

d) 1 billion solar masses

26 / 30

26. 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

27 / 30

27. 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

28 / 30

28. 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

29 / 30

29. How does the rate of Hawking Radiation emission change as a black hole's mass decreases?

a) The rate decreases

b) The rate increases

c) The rate remains constant

d) The rate fluctuates

30 / 30

30. What is a supernova?

a) The explosion of a star

b) The collapse of a galaxy

c) The formation of a planet

d) The birth of a star

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