ISP Chapter 17 - Chapter 17 Big Bang Theory THE BIG BANG ?...

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Chapter 17 Big Bang Theory THE BIG BANG ? The first Big Bang theory was proposed by? -catholic priest The early universe must have been extremely hot and dense Photons can convert into particle-antiparticle pairs and vice-versa Early universe is full of particles and radiation because of its high temperature What is the history of the universe according to the big bang theory HANDOUT!!!!!!!! Well understood ones first Era of galaxies Era of atoms o Background radiation released o Atoms from at age ~ 380,000 years Era of Nuclei o Stable helium nuclei from by age o About 5 min after big bang Era of nucleousynthesis o Matter annihilates remaining antimatter by age o About .001sec Particle Era o Amounts of matter and antimatter nearly equal o Roughly 1 extra proton for every 10^9 proton-antiproton pairs Four known forces 1. Strong force 2. Electromagnetism 3. Weak force 4. Gravity ? What force attracts electrons to the nuclei of atoms? -electromagnetic force
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This note was uploaded on 11/16/2011 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

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ISP Chapter 17 - Chapter 17 Big Bang Theory THE BIG BANG ?...

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