Physics 214 Assignment 8
Concepts:
EM Waves  relations between E, B and v
Polarization by reflection, Brewster's angle
Plane waves
Polarization
Reflection, Refraction of EM waves
Snell's law
Total internal reflection
Reading:
Y&F, Vol. 2, Chapters 32 and 33
Assignment:
Due in lecture on Thursday, March 27.
Please turn in this sheet stapled to the top of your work.
Physics Problems:
1. An EM traveling (plane) wave has an electric field given in the complex
representation by
[ ]
)
(
0
)
ˆ
ˆ
1
(
Re
t
kz
i
e
E
j
i
i
E
ω
−
⋅
+
⋅
=
G
,
where
i
and
and
are unit vectors in the
x
and
y
directions.
ˆ
j
ˆ
(a) What is the direction of propagation?
(b) Find the magnetic field
)
,
,
,
(
t
z
y
x
B
G
.
(c) Write real expressions for the
x
and
y
components of
E
G
at the origin as functions of
time. Then write expressions for the magnitude and direction (in terms of the angle
θ
measured from the +
x
axis) of
at the origin as functions of time. [This is an example
of
circular polarization
.]
E
G
2. An unpolarized beam of light (intensity
0
I
) is moving in the
x
direction. The light
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 THORNE
 Polarization, Snell's Law, Cornell University, Total internal reflection, Geometrical optics

Click to edit the document details