Lecture11 - Big Bang Black Holes No Math Dr Jonathan Asaadi...

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Big Bang, Black Holes, No Math Dr. Jonathan Asaadi Dr. Jonathan Asaadi Stars, Temperature and Stars, Temperature and Thermal Equilibrium Thermal Equilibrium Big Bang, Black Holes No Math Topic: Stars, Temp, and Thermal Equil. 1
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Useful tools on Blackboard Big Bang, Black Holes No Math Topic: Chem. and Nuc. Phys 2 1) Log on to Blackboard 2) Click on RUCourses 3) Click on PHSC108.01A.SP.14
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Big Bang, Black Holes No Math Topic: Chem. and Nuc. Phys 3 Useful tools on Blackboard 4) Click on “Weekly Lessons”
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Big Bang, Black Holes No Math Topic: Chem. and Nuc. Phys 3 Where I post all my lecture slides Extra reading material to explain the lecture Explanation of how to write a good Paper 1 The gradesheet I will use to assess your Paper
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Big Bang, Black Holes No Math Topic: Chem. and Nuc. Phys 5 40% of your paper's grade is based on the quality of your writing (Simple language, clear structure, proper grammar, no jargon) 60% of your paper's grade is based on getting the physics stated clearly and correctly and showing how they relate to each other Paper 1 due Wednesday March 5th
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Reading Assignment In Search of Schrodinger's Cat: Chapter 3 Brief History of Time: Chapter 3 Bring 2 questions for each chapter from the reading you want to have answered in class (Will be turned in for credit) Blackboard Questions online Please turn in your reading questions Please turn in your reading questions
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From last time: Photons and Atoms Photons can interact with Atoms in three ways Very low energy photon: Because the electron in the atoms can only have quantized states around the nucleus VERY low energy photons will be ignored, or bump the path of the atom Ignoring is a kind of interaction Big Bang, Black Holes No Math Topic: Atoms 7
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Photons can interact with Atoms in three ways If an atom encounters a photon with the “right energy” photon it can get “excited” and go into a higher energy state. Photon is absorbed and is gone forever Big Bang, Black Holes No Math Topic: Atoms 8 8 From last time: Photons and Atoms
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Photons can interact with Atoms in three ways If a REALLY energetic photon comes along it can completely knock an electron out of orbit from a nucleus Big Bang, Black Holes No Math Topic: Atoms 9 From last time: Photons and Atoms
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Putting it All Together A cartoon of an atom and a photon Note: The electron being completely out of the atom is a perfectly good “energy state” Big Bang, Black Holes No Math Topic: Atoms 10
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Recall: The Energy of Light Big Bang, Black Holes No Math Topic: Atoms 11 Large wavelength Low Energy Medium wavelength Medium Energy Small Wavelength Large Energy Remember that the Remember that the energy of a photon energy of a photon and the wavelength of and the wavelength of the photon are related the photon are related
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12 Atomic Transitions Any photon that hits the atom with the right energy will be absorbed Absorbs only special colors
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