Please feel free to contact me, if you have any problems whatsoever in this course: or if you're doing well, and just want to talk about the wonders and mysteries of the Universe. It's in my interest, and I care, that you do well!

News, updated 2012 February 10:

• PSci 21 labs on Monday, February 13 and Tuesday, February 14:
  Meet in the regular lab classrooms (McLane 258 and 264)
  at the regular lab times (5:30 or 7:30 p.m.) and do:
  
  
  Lab 3: The Basics of Optics and Telescopes.
  
  Be sure to read Lab 3 before arriving, well enough to be ready for a quiz.
  
  
  
• Read, by Wednesday, February 15:
  • Pages 102-110 of the (solar yellow) Class Notes.
  
  
  
• There is an error in Homework 3: The labels by the constellations
  "37", "38", and "39" should be "1", "2", and "3", respectively.
  
  
  
• Homework 3 (on Constellations and Logical Fallacies, on pages A9-A10 of the solar yellow Class Notes) is due in class as a paper copy during the first five minutes of class on Friday, February 17. Sorry, but late work will not be accepted.
  
  
  
• If you need homework help: I will be glad to help you during office hours (MWF 1-2, MW 4-5) in McLane 11 in J-wing. I can meet with students at other times too, but please either e-mail (ringwald@csufresno.edu) or phone (278-8426) first.
  
  Free tutors from the Department of Physics can also help with homework:
  
  M, Noon - 1 p.m. in McLane 167 by Michael Duncan
  M, 4 - 5 p.m. in McLane 258 by Navid Rad
  Tu, 8 - 11 a.m. in McLane 167 by Jonathon Thompson
  Tu, Noon - 2 p.m. in McLane 258 by Navid Rad
  W, 9 - 11 a.m. in McLane 174 by Arya Afshari
  W, 4 - 5 p.m. in McLane 258 by Dillon Trelawny
  Th, Noon - 2 p.m. in McLane 258 by Emmanuel Angulo
  
  You may recognize Michael Duncan and Dillon Trelawny as PSci 21 lab instructors. These can therefore also serve as their office hours.
  
  
  
• There will be no class on Monday, February 20.