Transcript Week 8 – Quiz #20

Week 9 (11/13) – Quiz #22
Which of the following statements is TRUE?
A.
B.
C.
D.
E.
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
Week 9 (11/13) – Quiz #23
Which of the following statements about the EPOCH OF
CONFINEMENT is TRUE?
A. At this instant, quarks became bound in sets of three to
produce protons and neutrons, while matter and
radiation continued to interact strongly
B. The Universe was matter dominated at this epoch
C. 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
D. This epoch was immediately followed by Inflation
E. Ducks and aadvarks got together to produce quarks
Week 9 (11/13) – Quiz #24
Which of the following statements about INFLATION is FALSE?
A. The Universe expands faster than the speed of light during
Inflation
B. 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
C. Inflation solves the CMBR horizon paradox/problem
D. Inflation violates the principles of Einstein’s General Theory
of Relativity
E. 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
Week 9 (11/15) – Quiz #25
Which of the following statements is TRUE?
A. Kepler’s 2nd law states that the orbits of planets are
ellipses with the Sun at one of two foci of the ellipse
B. Kepler’s 3rd law states that the square of the orbital
period is proportional to the cube of the orbital radius
C. Kepler’s laws apply only to the motion of planets in
our Solar System
D. Kepler’s 1st law states that the orbit of a planet around
the Sun sweeps out equal areas in equal times
Week 9 (11/15) – Quiz #26
Which of the following statements is FALSE?
A. The total energy per second radiated by a black body is
proportional to the fourth power of its temperature in
Kelvin
B. The peak wavelength at which a blackbody radiates
becomes shorter as the temperature of the blackbody
increases
C. The spectrum of a typical active galaxy is well
approximated by a black body spectrum
D. The radiation from stars is well approximated by black
body radiation
Week 9 (11/15) – Quiz #27
Which of the following statements about the nature of
ELECTROMAGNETIC RADIATION is FALSE?
A. It can be described as a wave of oscillating electric
and magnetic fields and obeys the law: c = λν
B. It can be described as “particles” of energy (photons)
that obey the law: E = hν
C. The earth’s atmosphere is transparent to all forms of
electromagnetic radiation
D. It travels at 300,000 km/s through vacuum
E. It can be converted to matter and vice versa following
the equation: E = mc2
Week 9 (11/15) – Quiz #28
Which of the following statements is FALSE?
A. The Michelson-Morley experiment established that
light is bent in a strong gravitational field
B. 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
C. Kepler’s laws can be used to describe the motion of
planets around the Sun
D. Hubble is credited with the discovery of the
expansion of the Universe
E. Guth and Linde formulated the theory of Inflation
Week 9 (11/15) – Quiz #29
Which of the following statements about the
FINGER OF GOD effect is FALSE?
A. It is a result of an incorrect assumption that the
recession velocity of all galaxies is purely a
result of Hubble expansion
B. It is caused by peculiar velocities
C. It is the result of local gravitational influences
D. It is an actual alignment of galaxies in a line
pointing towards the observer