Pop-quiz 21

1
Pop-quiz 21

• Which of the following statements is TRUE?
• Black holes can emit particles and thereby lose
  mass this is called Hawking radiation
• John Wheeler coined the theorem A black hole has
  no hair because he was bald and thought of
  himself as a black hole
• The concept of gravity trapping light is a direct
  consequence of the Special Theory of Relativity
• Most stars have supermassive black holes at their
  centers
• The so-called dark energy that is driving the
  acceleration of the Universe and the so-called
  dark matter that makes its presence felt
  through gravity are present in equal amounts in
  the energy budget of the Universe i.e. they
  contribute equally to the overall ? of the
  Universe

2
Pop-quiz 22

• Which of the following statements is TRUE?
• Inflation is the astronomical term used to
  describe the transformation our bellies undergo
  at holiday time
• Gravity was the last of the four fundamental
  forces of Nature to freeze out
• The Universe was radiation dominated at early
  times, but has been matter dominated ever since
  its 300,000th birthday
• Most of the elements in the periodic table were
  synthesized in the early Universe and this is
  known as Big Bang Nucleosynthesis
• The detection of the Cosmic Microwave Background
  Radiation proves that the Steady State Cosmology
  hypothesis is correct

3
Pop-quiz 23

• Which of the following statements about the EPOCH
  OF CONFINEMENT is TRUE?
• At this instant, quarks became bound in sets of
  three to produce protons and neutrons, while
  matter and radiation continued to interact
  strongly
• The Universe was matter dominated at this epoch
• Protons and electrons formed stable hydrogen
  atoms for the first time at this epoch, and the
  matter in the Universe became mostly transparent
  to radiation
• This epoch was immediately followed by Inflation
• Ducks and aadvarks got together to produce quarks

4
Pop-quiz 24

• Which of the following statements about INFLATION
  is FALSE?
• The Universe expands faster than the speed of
  light during Inflation
• The rapid expansion during Inflation is driven by
  a repulsive anti-gravity force whose mathematical
  properties are similar to that of Einsteins
  Cosmological Constant ?
• Inflation solves the CMBR horizon paradox/problem
• Inflation violates the principles of Einsteins
  General Theory of Relativity
• Inflation naturally gives rise to the tiny
  quantum fluctuations in the early Universe that
  are the seeds from which galaxies and galaxy
  clusters grow under the influence of gravity