Then click on "Current Homework Assignment".
[Due Friday 4/1/2011 by 5:00 pm in my mailbox - Workman 333]
[Due Friday 3/11/2011 by 5:00 pm in my mailbox - Workman 333]
[Due Monday 3/7/2011 by 5:00 pm in my mailbox - Workman 333]
[Due Monday 2/28/2011 at 11:59 pm]
[Due Monday 2/28/2011 in class]
[Due Monday 2/21/2011 at 11:59 pm]
[Due Monday 2/21/2011 in class]
[Due Monday 2/14/2010 in class]
[Extended to Tuesday 2/8 at 11:59 pm]
[Extended to Wednesday 2/9/2011 in class]
HINT: I could not do this problem the way Wolfson seemed to suggest, so I will assume you cannot either. Here was my approach: The trick with the problem is to figure out what property of a "focus" to use to prove that f = R/2. I used the property that rays parallel to the optical axis all converge to the same point (the focus). I have posted a figure here to give you some guidance In my figure, I show "h", which is arbitrary, and angles alpha, beta, theta and theta'. There are relationships between these angles, and I ask you to find them. Once you have found the relations, you will see the relationship between R and f, and that f=R/2. You will also need the small angle approximation for the tangent function. As I have explained in class, you should use a principle from geometry, trigonometry, or physics that justifies each step in your "proof".
[Due Saturday 1/29/2011 at 11:59 pm]
[Due Friday 1/28/2011 in class]
[Due Friday 1/21/2011 at 10:45 am]