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Vikash chaudhary

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

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

1. 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*

2 / 30

2. What was the primary objective of the NICER mission launched by NASA in 2018?

a) Studying the atmosphere of Mars

b) Observing the outer planets of the solar system

c) Investigating the interiors of neutron stars

d) Mapping the magnetic fields of distant galaxies

3 / 30

3. 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

4 / 30

4. What is time dilation near a black hole, as predicted by general relativity?

a) Time speeds up near a black hole

b) Time slows down near a black hole

c) Time remains constant near a black hole

d) Time reverses near a black hole

5 / 30

5. What is the name of the radio source associated with Sagittarius A*, the supermassive black hole at the center of the Milky Way?

a) Cygnus X-1

b) V404 Cygni

c) Cassiopeia A

d) Sagittarius A*

6 / 30

6. What information can scientists gather by studying the X-ray emissions from black holes?

a) The exact mass of the black hole

b) The composition of the accretion disk

c) The distance to the nearest star

d) The speed of light near the event horizon

7 / 30

7. What was the main finding of the recent study using the NICER mission data regarding the spinning of black holes?

a) Confirmation of the no-hair theorem for black hole spin

b) Discovery of irregularities in the spin rates of black holes

c) Determination of the maximum possible spin rate for black holes

d) Evidence for the existence of rapidly spinning black holes

8 / 30

8. What significant event in black hole astronomy occurred in 2017 with the detection of gravitational waves from a binary neutron star merger?

a) First direct imaging of a black hole event horizon

b) First observation of a supermassive black hole feeding

c) First detection of a black hole-neutron star binary system

d) First detection of electromagnetic counterparts to gravitational waves

9 / 30

9. 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

10 / 30

10. Which observation supports the idea that black holes can form from the collapse of massive stars, as predicted by general relativity?

a) The detection of neutrinos

b) The redshift of distant galaxies

c) The observation of supernova remnants

d) The discovery of exoplanets

11 / 30

11. What is the singularity inside a black hole?

a) A large mass

b) A region of zero volume and infinite density

c) A light source

d) A space-time warp

12 / 30

12. What is the typical end state of a star with a mass greater than 20 solar masses after it exhausts its nuclear fuel?

a) White dwarf

b) Neutron star

c) Stellar-mass black hole

d) Red giant

13 / 30

13. What international space agency is collaborating with NASA on the James Webb Space Telescope (JWST) mission?

a) European Space Agency (ESA)

b) Russian Space Agency (Roscosmos)

c) China National Space Administration (CNSA)

d) Indian Space Research Organisation (ISRO)

14 / 30

14. What distinguishes primordial black holes from other types of black holes?

a) Their formation from the collapse of massive stars

b) Their existence since the early universe

c) Their formation from the merger of neutron stars

d) Their presence in the center of galaxies

15 / 30

15. Which type of black hole is formed from the remnants of a single massive star?

a) Stellar-mass black hole

b) Intermediate-mass black hole

c) Supermassive black hole

d) Primordial black hole

16 / 30

16. Which method is used to estimate the mass of a stellar-mass black hole in a binary system?

a) Measuring the orbital period and velocity of the companion star

b) Observing the color of the black hole

c) Measuring the intensity of gravitational waves

d) Counting the number of planets in the system

17 / 30

17. What is gravitational lensing, a phenomenon commonly observed near black holes?

a) The distortion of space and time by gravity

b) The emission of gravitational waves

c) The bending of light around massive objects

d) The stretching of matter into spaghetti-like shapes

18 / 30

18. 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

19 / 30

19. What instrument was used by astronomers to make the discovery of the disk of gas around Sagittarius A* in 2020?

a) Hubble Space Telescope

b) Chandra X-ray Observatory

c) Atacama Large Millimeter/submillimeter Array (ALMA)

d) Very Large Telescope (VLT)

20 / 30

20. What groundbreaking discovery was announced by astronomers in 2020 regarding the black hole at the center of the Milky Way?

a) Evidence of a supermassive black hole merger

b) Detection of gravitational waves from Sagittarius A*

c) Identification of a new class of intermediate-mass black holes

d) Confirmation of the existence of a disk of gas orbiting Sagittarius A*

21 / 30

21. 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

22 / 30

22. 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

23 / 30

23. What effect does the intense gravitational pull of a black hole have on nearby light?

a) Light is repelled away from the black hole

b) Light is attracted toward the black hole

c) Light is accelerated to superluminal speeds

d) Light is unaffected by the black hole's gravity

24 / 30

24. What is gravitational time dilation, a phenomenon predicted by general relativity?

a) The acceleration of time near massive objects

b) The constant speed of light

c) The slowing down of time near massive objects

d) The bending of light near massive objects

25 / 30

25. 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

26 / 30

26. Where are supermassive black holes typically found?

a) In the outer regions of galaxies

b) In the center of galaxies

c) In open star clusters

d) In the space between galaxies

27 / 30

27. 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

28 / 30

28. 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

29 / 30

29. Which phenomenon is often observed near supermassive black holes due to their intense gravitational fields?

a) Supernova explosions

b) Gravitational lensing

c) Pulsar emissions

d) Stellar formation

30 / 30

30. 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

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Black Hole Online Test

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

Please provide accurate information so we can send your Achievement Certificate by mail.

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