Particles, Forces and the Big Bang Flashcards
The cosmological principle states that viewed on a large enough scale:
A. The universe is flat
B. The cosmic background radiation is uniform
C. The properties of the universe are the same for all observers
D. The universe is unchanging
C. The properties of the universe are the same for all observers
Which of the following particles is not a boson
A. A photon
B. The Higgs particle
C. An electron
D. A gluon
C. An electron
If there were no dark energy, then the universe would end in a big crunch provided…
The density is greater than the critical density
Which of the following is a correct statement about the era of nucleosynthesis
A. Stable atoms existed
B. Hydrogen and helium nuclei were formed
C. The electromagnetic and weak forces were unified
D. There were greater quantities of antimatter than matter
B. Hydrogen and helium nuclei were formed
Ptolemy’s cosmological model explained retrograde motion by
Using epicycles
A likely explanation for why we haven’t observed exotic relic particles is
A. Inflation
B. Dark energy
C. A failure of the cosmological principle
D. CP-violation
A. Inflation
Which of the following statements is true of neutrinos
A. They have zero mass
B. They mediate (i.e. carry) the strong force
C. They are produced during beta decay
D. They are composed of Quark
They are produced during beta decay
Which of the following is NOT a correct statement about the big bang
A. It explains why the sky is dark at night
B. It predicts the existence of the cosmic microwave background radiation
C. It predicts the correct abundances of hydrogen and helium
D. It predicts that on a large enough scale, the universe is flat
D. It predicts that on a large enough scale, the universe is flat
Newton argued that
The same force causes objects to fall on earth and planets to orbit the sun
The effect dark energy has is to
