Homework on Semiconductors Quick Links: Reflection   Expand Your Thinking   Demonstrate Your Mastery Refraction   Expand Your Thinking   Demonstrate Your Mastery Optical Fibers   Expand Your Thinking   Demonstrate Your Mastery Put It All Together Temporary Link (for Reviewers) to Solutions (For Instructors)

Atomic Structure and Bands

Expand Your Thinking

Many of these questions have no "right" answer but are inquiry-style questions to encourage deeper thinking about the subject.  Some instructors may therefore choose to use them as discussion questions rather than as homework.

1.	Li
2.	T.
3.	We s
4.	Laser
5.	If a las
6.	b
7.	Jim, an introductory physics student, is confused by his laboratory results.  Jim's measurements of the voltage across and current through a resistor show a resistance that changes at high voltages.  But commercial resistors are supposed to be ohmic and have resistances that do not depend on voltage or current.  His instructor explained that Jim had exceeded the recommended voltage for his resistor, and the resulting heat produced by the resistor changed the resistance.  Jim had been taught that resistance can increase with temperature, so he thought he understood the explanation until he looked more closely at his data.  Jim's measured resistance decreased as he exceeded the allowed voltage and heated up the resistor.  Can Jim's data be consistent with our understanding of conduction, or does he need to retake his data?  Explain your answer as if you were talking to Jim.
8.	A friend who has not taken any physics courses asks you about semiconductors.  "I hear the term 'semiconductor industry' in the news all the time.  What exactly is a semiconductor?"  How would you define semiconductors to your friend?

Demonstrate Your Mastery
 

9.	Draw an energy diagram with electrons for the ground state atoms of the following elements:  Hydrogen, Aluminum, Sodium, Potassium, and Carbon.  Indicate the principle quantum number for each energy level and whether each energy shell is completely filled or half-filled.
10.	Lig
11.	Ligh

 

Refraction

Expand Your Thinking

Many of these questions have no "right" answer but are inquiry-style questions to encourage deeper thinking about the subject.  Some instructors may therefore choose to use them as discussion questions rather than as homework.

12.	Dra
13.	Ac
14.	Two
15.	The
16.	Two f
17.	You
18.	Whyh

Demonstrate Your Mastery
 

19.	Li
20.	Lig
21.	Light
22.	Laser
23.	Light
24.	The
25.	Cubic

 

Optical Fibers
Expand Your Thinking
 

26.	S
27.	Lis
28.	Y
29.	W

Demonstrate Your Mastery
 

30.	What
31.	A fiber
32.	A given
33.	Mea
34.	A given?
35.
36.	ic.

Put It All Together

37.  A step-in

a.	Wha.
b.	What
c.	In w
d.	Sho
e.	The cr
f.	In yo
g.	Wh
h.	What is.
i.	Will
j.	Use.
k.	Use
l.	C