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Transcript
```Announcements 2/8/12


Prayer
Exam review lecture on Friday
(I’m passing around a sheet).
b. There are 10 problems. Each problem will get
2-3 students. Do not be the third student to
2 students.
c. Pass the sign-up sheet back and I’ll read out
the final groups at the end of class.
d. See my email from Monday for more details
(email me solution in pdf form, etc.)

An “optic axis” is a direction for which:
a. one of the two n values is complex
b. one of the two n values is equal to 1
c. the two n values are the same
d. the two n values sum to 1
Example 4 from last time
1.2



n
1.3



1.4


n = 1.3 is one of the n’s
k in  0.746712, 0, 0.665148 direction
k in  0.746712, 0,  0.665148 also works
in x-z plane, and

In a uniaxial crystal, the index of refraction matrix,
 nx

n


a.
b.
ny
 ne

n


 no

n




 has the form:
nz 
ne



ne 
no



no 
c.
d.
 no

n


 no

n


ne
no



ne 



ne 
Uniaxial Crystals
Optic axis along surface

Normal incidence

In a uniaxial crystal, which vector always obeys
Snell’s law?
a. k (wavevector)
b. S (Poynting vector)
c. neither k nor S

T/F: In the situation depicted
(note the orientation of the zaxis!), s-polarized light will see
n=no inside the crystal,
regardless of angle.
a. True
b. False
Optic axis perpendicular to surface

At an angle

s-polarized (easy!)…
Optic axis perpendicular to surface

p-polarized (hard!)
a. “Snell’s Law” replacement
b. Direction of Poynting vector (energy flow)
Exam 1: Chapters 1-5
Starts Fri, Feb 10

Ends Tues, Feb 14

Exam info
a. 10 multiple choice problems, 1.5 pts each
– A few are from the true/false review questions. I
won’t tell you the answers to the T/F questions, but
you should definitely talk amongst yourselves.
b. 8 worked problems
– Two of them involve written explanations
– One involves sketching a few graphs
– One is a review problem we’ll cover Friday (lucky
group!)
c. Expected average time: 2 hours

```
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