At about 10 s after the Big Bang, the universe had cooled to a temperature of approximately
Question:
(a) Calculate the thermal energy kKT of the universe at that temperature.
(b) Explain what happened to most of the hadrons-protons and neutrons-at that time.
(c) Explain what happened to electrons and positrons in terms of temperature and time.
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THINK At a time of about t 10 6 s after the Big Bang the universe had cooled to a temperature of T 1...View the full answer
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Related Book For
University Physics With Modern Physics
ISBN: 978-0073513881
2nd edition
Authors: Wolfgang Bauer, Gary Westfall
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