notes on early final exam •Date: Thursday July 21, 2011 •Time: 7:00-9:30 PM •Location: Phys 235 and Phys 313 –go to room P235 if your last name begins in A-K –go to room P313 if your last name begins in L-Z •Structure: –True/false (~10%) –Multiple Choice (~30%) –Short Answer (~55%) •Material covered: anything/everything from the whole course with slight emphasis on second half of term •Memorization not the key… –formulas and necessary numbers will be provided July 2011final exam review

notes on registrar’s final exam •Date: Friday August 12, 2011 •Time: 7:30-10:00 PM •Location: PAC 1 •Structure: –True/false (~10%) –Multiple Choice (~30%) –Short Answer (~55%) •Material covered: anything/everything from the whole course with slight emphasis on second half of term •Memorization not the key… –formulas and necessary numbers will be provided July 2011final exam review

•For review of material before the midterm, see theMidterm Review File July 2011final exam review

Solar Atmosphere •Photosphere – the Sun’s apparent surface –T~5800K –granulation.. => convection –sunspots… => magnetic field –sunspot cycle => connection to interior •Chrompsphere –flares, prominences, loops <=> magnetic field, sunspots etc. –T increases outward from ~6000K to 106K •Corona –very low density high T (ionization, not BB temp) –shape, mass ejections… also related to magnetic field cycle July 2011final exam review

Solar Interior •equilibrium and T core –stable L,T over time => stable R, equilibrium/balance –Gravity/pressure balance => T core –from simple arguments, Tcore107K •equilibrium and energy sources –stable L,T,R also => energy emitted = energy produced –Energy produced by Sun over SS lifetime = LsunxTSS =5.4x1043J –Only viable energy source is nuclear fusion (also gravity) •H-> He fusion –H= 75% of Sun’s mass (most plentiful “fuel”) –lowest T reaction –4H -> 1He –energy source for all MS stars July 2011final exam review Pgas =nkT

Stars: Distance •

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