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103 Exam 2 Review

103 Exam 2 Review. 12 November 2007. General Comments. 35 Multiple Choice Questions Concepts and Ideas Lecture Focused Review Slides Answer Practice Questions and understand them Review HW and Book Objects -- emphasis on the Sun. Topics to Review. Nature of Light Blackbodies

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103 Exam 2 Review

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  1. 103 Exam 2 Review 12 November 2007

  2. General Comments • 35 Multiple Choice Questions • Concepts and Ideas • Lecture Focused • Review Slides • Answer Practice Questions and understand them • Review HW and Book • Objects -- emphasis on the Sun

  3. Topics to Review • Nature of Light • Blackbodies • Kirchoff’s Laws • Doppler Shift • Telescopes • Parallax • Sun • Parts of the sun • Hydrostatic equilibrium (“sun’s thermostat”) • Sun’s source of energy (fusion)

  4. Light • What are the relationships between wavelength, frequency, the speed of light, energy, etc? • How do a star’s brightness and luminosity change with distance? • What is the difference between blackbody emission and emission lines? What types of objects give this emission?

  5. Light

  6. This is an inverse-square law – the brightness decreases as the square of the distance (d) from the source Light

  7. Wien’s Law Stefan-Boltzman Law Light Gentle collisions Hard collisions

  8. Light

  9. Light

  10. Light

  11. Doppler Shift

  12. Telescopes • What is the difference between resolution and sensitivity? What do those terms mean? • What determines a telescope’s resolution? • What role to Earth’s atmosphere play in telescope design and placement? What telescopes go into space?

  13. Telescopes • Sensitivity: Amount of light ResolutionRefraction, Dispersion, Diffraction

  14. Telescopes

  15. Parallax

  16. Sun • What keeps the sun balanced? • Where does the sun get its energy? • What defines the various parts of the sun? What makes them all interesting? • What is the “neutrino problem?” • What effects does the magnetic field in the sun lead to? (there are many)

  17. Sun “Thermostat”

  18. Sun FUSION! Requires high density, temp

  19. Sun FUSION! Proton-Proton Chain Gives off a “neutrino”

  20. Sun Other Things: Sun Spots Solar Wind Solar Flares

  21. Sun Role of Magnetic Field: Heats corona Causes sun spots Leads to solar cycle

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