Physics 7. Homework # 9
Due:
5/31
1) What is the cosmic background
radiation?
a) The result of many supernova
explosions
b) The afterglow from the Big
Bang, very strongly red-shifted
c) The glow produced by the sun
in most astronomical observations
d) A noise produced by quantum
effects in the instruments that measure microwaves emissions form stars
2) Name
two confirmed predictions of the Big Bang hypothesis
a) The cosmic background
radiation and the abundance of light elements
b) The existence of black holes
c) The equivalence of the
inertial and gravitational masses
d) The absolute nature of the
speed of light
3) Name
one puzzle connected with the Big Bang hypothesis
a) The existence and origin of
the cosmic background radiation
b) The amount of helium relative
of hydrogen
c) The fact that the universe is
expanding
d) The almost perfect uniformity
of the cosmic background radiation
4) If
you are in the middle of a large room filled with ping-pong balls (they are
above, below and all around you), what can you say about your surroundings
a) They are homogeneous and
isotropic
b) Only homogeneous
c) Only isotropic
d) Neither homogeneous nor
isotropic.