Announcements 3/5/12
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Prayer
Grayson Tues office hours: 3-5 pm instead of 4-6 pm.
Exam 2 review: next lecture
a. I’m passing out exam review problems for sign up
b. Only 6 review problems
– 4.5 students per problem
 Don’t be the 5th person to sign up for a
problem until all problems have 4 people
– 7 minutes per group
c. Email me your solution in pdf form by 1:45 pm
Wednesday; that will count as HW 17. Be sure to
list your group members in the email.
Exam 2 goes from Wednesday until Saturday night
No homework on Thursday or next week Tuesday. 
Daily Comic
Reading Quiz
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Young’s classic experiment produces
interference between how many slits?
a. 1
b. 2
c. 3
d. 4
e. more than 4
Reading Quiz
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In Young’s experimental setup, the light will
typically produce more visible fringes if it comes
from
a. a small source
b. a large source
c. doesn’t depend on source size
Young’s 2-slit experiment
Young’s experiment with extended source
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Source is made up of a bunch of noncoherent
points (infinite number)
What’s given on the exam
Not given:
C 
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max( Sig )  min( Sig )
V
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max( Sig )  min( Sig )
  ( )

2
d
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hC 
  ( h)

2
dh