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Week 9 (11/13) – Quiz #22

Week 9 (11/13) – 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

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Week 9 (11/13) – Quiz #22

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  1. Week 9 (11/13) – Quiz #22 Which of the following statements isTRUE? • 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 it’s 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

  2. Week 9 (11/13) – 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

  3. Week 9 (11/13) – Quiz #24 Which of the following statements about INFLATION isFALSE? • 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 Einstein’s Cosmological Constant Λ • Inflation solves the CMBR horizon paradox/problem • Inflation violates the principles of Einstein’s 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

  4. Week 9 (11/15) – Quiz #25 Which of the following statements isTRUE? • Kepler’s 2nd law states that the orbits of planets are ellipses with the Sun at one of two foci of the ellipse • Kepler’s 3rd law states that the square of the orbital period is proportional to the cube of the orbital radius • Kepler’s laws apply only to the motion of planets in our Solar System • Kepler’s 1st law states that the orbit of a planet around the Sun sweeps out equal areas in equal times

  5. Week 9 (11/15) – Quiz #26 Which of the following statements isFALSE? • The total energy per second radiated by a black body is proportional to the fourth power of its temperature in Kelvin • The peak wavelength at which a blackbody radiates becomes shorter as the temperature of the blackbody increases • The spectrum of a typical active galaxy is well approximated by a black body spectrum • The radiation from stars is well approximated by black body radiation

  6. Week 9 (11/15) – Quiz #27 Which of the following statements about the nature of ELECTROMAGNETIC RADIATION is FALSE? • It can be described as a wave of oscillating electric and magnetic fields and obeys the law: c = λν • It can be described as “particles” of energy (photons) that obey the law: E = hν • The earth’s atmosphere is transparent to all forms of electromagnetic radiation • It travels at 300,000 km/s through vacuum • It can be converted to matter and vice versa following the equation: E = mc2

  7. Week 9 (11/15) – Quiz #28 Which of the following statements is FALSE? • The Michelson-Morley experiment established that light is bent in a strong gravitational field • Einstein received the Nobel Prize in Physics for explaining the photo-electric effect and the “particle” (photon) nature of light given by the law: E = hν • Kepler’s laws can be used to describe the motion of planets around the Sun • Hubble is credited with the discovery of the expansion of the Universe • Guth and Linde formulated the theory of Inflation

  8. Week 9 (11/15) – Quiz #29 Which of the following statements about the FINGER OF GOD effect is FALSE? • It is a result of an incorrect assumption that the recession velocity of all galaxies is purely a result of Hubble expansion • It is caused by peculiar velocities • It is the result of local gravitational influences • It is an actual alignment of galaxies in a line pointing towards the observer

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