Risk Latte - BH Quiz #2

Black Holes (Easy) Quiz #2

(For all numerical problems, you are required to make an educated guess)

  1. A black hole is black because

    a) It is shrouded in black gases
    b) It does not reflect light, nor does its surface emit any light
    c) It has no mass
    d) It is always eclipsed by another massive neutron star

  2. Einstein's equation of General Relativity deals with a certain kind of equations in mathematics known as

    a) Ordinary differential equations
    b) Partial differential equations
    c) Matrix equations
    d) Groups and Rings

  3. In 1974 Stephen Hawking startled physicists worldwide by proving that black holes are not actually black but they radiate and lose mass. This showed that

    a) Einstein's equation of General Relativity was wrong
    b) Stephen Hawking had used wrong set of assumptions
    c) Both Einstein and Hawking were right but the difference in their calculations were due to incompatibility of classical and quantum mechanics;
    d) Einstein's equation had a major flaw which Hawking corrected

  4. The first reference to celestial objects similar to black holes was made by

    a) John Michell in 1783
    b) Pierre Simon Laplace in 1795
    c) James Clark Maxwell in 1865
    d) Bernhard Riemann in 1842

  5. All mass of a black hole is

    a) Contained within the singularity
    b) Contained with the event horizon
    c) Equally distributed between event horizon and singularity
    d) Contained within the space that is half way between the event horizon and singularity

  6. A white hole is
    a) A black hole running backwards in time
    b) A black hole that is formed due to supernova explosion and can be detected by telescopes;
    c) A black hole which has a mass of three times our Sun or more
    d) A particular kind of a wormhole

  7. The largest known black hole in the Universe is in

    a) our own galaxy, the Milky Way
    b) Messier 87 galaxy
    c) Andromeda galaxy
    d) None of the above

  8. If our Sun suddenly became a black hole, will be notice?

    a) Yes, we will notice
    b) No, we will not notice
    c) Whether we notice this fact or not will depend on how fast the Sun transforms into a black hole;
    d) Whether we notice this fact or not will depend on the process through which it becomes a black hole

  9. If our Sun suddenly became a black hole then

    a) Its gravitational effect on earth will increase
    b) Its gravitational effect on earth will decrease
    c) Its gravitational effect on earth will remain same
    d) Its gravitational effect will increase for a while and then decrease

  10. Quantum Field Theory (QFT), a branch of physics, is also known as:

    a) Theoretical Quantum Mechanics
    b) ticle Physics
    c) String Theory
    d) Membrane Theory

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