Deck 81: The Edges of the Universe

Question 1

The cosmic microwave background is

A) the result of radioactive decay of elements produced in supernovae explosions.
B) scattering of microwaves by dust particles.
C) electromagnetic waves from cold hydrogen gas.
D) radiation resulting from the beginning of the universe.

Answer 1

radiation resulting from the beginning of the universe.

Question 2

His question made a paradox of why the universe is not infinite in all aspects:

A) Newton
B) Einstein
C) Hubble
D) Obler

Answer 2

Obler

Question 3

The universe has matter evenly distributed; this principle is called _____.

A) homogeneous
B) isotropic
C) Hubble time
D) Hubble constant

Answer 3

homogeneous

Question 4

The maximum distance that light can travel during the age of the universe is called ______.

A) cosmic region
B) cosmic horizon
C) cosmic dimensions
D) Hubble horizon

Question 5

When photons had their last interactions with the big bang gas is the ___________________.

Question 6

The remnant of the beginning of the universe is called the _______.

Question 7

Dark matter began clumping even before the last scattering epoch.

Question 8

The CMB is about 3K.