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12 Cards in this Set
- Front
- Back
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What is the current temperature of the universe |
A few degrees K |
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What is the charge of an antielectron |
Positive |
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What happens when a proton collides with an antiproton |
The convert into two photons |
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Which of the following does not provide strong evidence for the big bang theory |
Observations of the amount of hydrogen in the universe |
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what kinds of new particles are being produced in particle accelerators |
Both matter and anitmatter |
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What kinds of particles were present in the universe during the particle era |
Approximatley equal amounts of matter and anitmatter |
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What kinds of particles were present in the universe during the era of nucleosynthesis |
mostly matter |
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What kinds of atomic nuclei were present in the universe during the era of nuclei |
mostly hydrogen and helium nuclei |
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If you had been present in the universe at the beginning of the era of atoms, what color light would you have seen? |
red light |
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Which of the following does inflation help to explain |
The uniformity of the cosmic microwave background |
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Adding the idea of inflation to the big bang theory accounts for |
the orgin of galaxies |
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Which of these pieces of evidence supports the idea that inflation really happens |
Observation of the cosmic microwave background that indicate a flat geometry for the universe |
