1. 103 Exam 2 Review
12 November 2007
2007 November 12

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
2007 November 12

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)
2007 November 12

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?
2007 November 12

5. Light
2007 November 12

6. Light This is an inverse-square law – the brightness decreases as the
square of the distance (d) from
the source
Light
2007 November 12

7. Light Wien’s Law Stefan-Boltzman Law Gentle collisions Hard collisions
2007 November 12

8. Light
2007 November 12

9. Light
2007 November 12

10. Light
2007 November 12

11. Doppler Shift
2007 November 12

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?
2007 November 12

13. Telescopes
Sensitivity: Amount of light Resolution Refraction, Dispersion, Diffraction
2007 November 12

14. Telescopes
2007 November 12

15. Parallax
2007 November 12

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)
2007 November 12

17. Sun
“Thermostat”
2007 November 12

18. Sun
FUSION!
Requires high density, temp
2007 November 12

19. Sun FUSION! Proton-Proton Chain Gives off a “neutrino”
2007 November 12

20. Sun
Other Things:
Sun Spots
Solar Wind
Solar Flares
2007 November 12

21. Sun Role of Magnetic Field: Heats corona Causes sun spots
Leads to solar cycle
2007 November 12