Chapter12 - Big Bang, Black Holes, No Math ASTR/PHYS 109...

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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 1 Big Bang, Black Holes, No Math ASTR/PHYS 109 Dr. David Toback Lectures 15 & 16
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 2 Prep for Today (Is now due) – L16 Reading: BBBHNM 13 Reading questions: Chapter 13 End-of-Chapter Quizzes: Chapter 11 Paper Stuff Paper 1: Misgraded? Let us know Paper 2 Calibrations: Wed 4PM in CPR Paper 3: Will be assigned after we finish Chapter 12
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math Paper 3 What is the evidence for the Big Bang? Now on CPR Same format as previous papers Make sure to read all the instructions in CPR Due 1 week after we finish this chapter 3
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math Paper 3 Stuff Same format at Paper 2 Phase I: Optional If you want feedback, you need to turn in a draft early on eLearning Phase II: Due in CPR and turnitin.com Phase III: All CPR stuff 4
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 5 Overview Evidence for the Big Bang? Finished: The Exploding Universe Expanding Space-Time This Time: More evidence for a hot early Universe? Photons and Hydrogen in the Universe
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 6 Cosmic Background Radiation The Cosmic Background Radiation provides, perhaps, the most compelling piece of evidence for the story of the Big Bang Unfortunately, it’s the hardest to explain to the non-scientist Radiation = Photons
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 7 Two Different Pieces of Evidence When we look at the stuff in the Universe we see that 1. ~75% of the atoms are hydrogen, ~25% are helium and very little of everything else 2. Lots of photons uniformly distributed in Thermal Equilibrium at around 3 degrees Kelvin Cosmic Background Radiation
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 8 Prelude to the Story To understand the cosmic background radiation we need to understand a little about the evolution of the Universe Similarly, to understand the evolution of the Universe we need to understand about these photons everywhere in the cosmos
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 9 Outline A ridiculously brief history of time The Early Universe and its Particles in Thermal Equilibrium Nuclei and atoms and their reactions in the Early Universe The stuff in the Early Universe As the Universe expands and cools
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Evidence for the Big Bang Topic 3: Photons and Hydrogen in the Universe Big Bang, Black Holes, No Math 10
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This note was uploaded on 01/06/2012 for the course PHYS 109 taught by Professor Davidtoback during the Fall '11 term at Texas A&M.

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Chapter12 - Big Bang, Black Holes, No Math ASTR/PHYS 109...

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