Chapter 19
Sound and Hearing
is in decibels (dB)
Threshold of pain: I = 1.00 W/m2; = 120 dB
Threshold of hearing: I0 = 1.00 x 10-12 W/ m2 ; = 0 dB
Intensity of sounds
Examples
Sound Intensity
Pressure
amplitude (Pa)
Hearing threshold
3 10-5
Classroom
0.0
Self Inductance and RL Circuits
Chapter 36
R
I
a
B(t)
i
b
~
e
I
L
Lecture Outline
Concept of Self-Inductance
Definition of Self-Inductance
Calculation of Self-Inductance for Simple Cases
RL Circuits
Energy in Magnetic Field
Mutual Inductance
Self Ind
Final Exam Review
Comprehensive (all chapters)
One/two pages of formula/notes
110 minutes
7 - 8 pages of questions
Comprehensive
Show your work for partial credit
Draw clear diagrams
Chapter 17, 18, and 19
Be able to calculate: period, frequency, an
Chapter 43
Grating and Spectra
Diffraction Grating
The condition for maxima is
d sin bright = m
m = 0, 1, 2,
The integer m is the order
number of the diffraction
pattern
If the incident radiation
contains several wavelengths,
each wavelength deviates
thr
Chapter 39
The Nature and Propagation of Light
Light is an Electromagnetic Wave
Electro-magnetic radiation is produced when a charged particle
oscillates.
An electro-magnetic wave consists of oscillating electric and
magnetic fields at 90 to each other.
L
Chapter 38
Maxwell Equations and Electromagnetic Waves
EM laws
Both equations have the same symmetry (the difference is that
magnetic charge does not exist!)
Where is the symmetry?
Maxwell proposes a modification of Amperes Law by adding
another term (the
Chapter 18
Mechanical Waves
Transfer of energy into a direction which is created when a source
of energy causes a vibration (repeating back-and-forth motion)
Wave:
A disturbance that moves (propagates) through some
material (medium)
water waves
sound wave
Diffraction
Interference: Waves Interacting with One Another
Diffraction: Waves Spreading Out from a Hole or Bending at the corners
a
< a
> a
a
Single Slit Diffraction
For far field, very distant screen:
the location of the mth dark fringe is given by:
s
Chapter 40
Geometric Optics
plane mirrors
The rays appear to originate from the
image behind the mirror : virtual image
Real Side
Measurements in real side are +
Virtual Side
Number of images = ( 360 / mirrors angle) -1
Concave Mirror
Convex Mirror
f:foca
Exam 2 Review
Chapters 18,19, 38, 39
Bring one page of formula/notes
55 minutes
4 - 6 pages
Show your work for partial credit
Draw clear diagrams
Dont forget the Units
Have proper significant figures
Ch 18 - Wave
y = ym Sin 2 / ( x- v t)
I=P/4r2
Wa
Chapter 37
RLC circuits - AC currents
Oscillation without damping
Supplying energy at the rate the resistor dissipates it.
A sinusoidally varying emf (AC generator) will sustain
sinusoidal current oscillations.
= m Cos t
: natural frequency (1/ LC)
:dam
Chapter 17
Oscillations
Periodic Motion/ Oscillation: Any motion that repeats itself in
equal intervals of time. (Stable equilibrium position, restoring
force)
Amplitude: A, maximum displacement from the equilibrium.
Period: T, The time required for one c
Exam 1 Review
Chapters 36, 37, 17
(RLC, SHM, Wave)
Bring one page of formula/notes
55 minutes
4 - 6 pages
Show your work for partial credit
Draw clear diagrams
Dont forget the Units
Have proper significant figures
Ch 36- R/L/C (DC) circuit
Compare w
Chapter 44: Sections 1-3
Polarization
Polarized Wave: Has only one preferred orientation.
Un-polarized Wave: Has no preferred orientation or
has all orientations.
Partially polarized wave: Has preferred orientation
but has energy in other orientations as
Acceleration of a Freely Falling Object: Picket Fence Lab
10/06/2015
Partners: Yvonne Pablistan, Bailee Rice
Darien Lighthart
Purpose: To observe how altering a free falling objects motion with weight and tilt alters the data
collected about velocity and
Projectile Motion
Partner: Yvonne Pablistan
Darien Lighthart
10/15/2015
Purpose: To observe and analyze projectile motion when an object is launched, rolled, or dropped with an
initial velocity that is not equal to zero.
Set Up: The experiment requires
A
Newtons Second Law of Motion
Partner: Yvonne Pablistan
11/05/2015
Purpose: To verify Newtons law F=ma by varying the masses of a two-mass system and
observing the changes in acceleration.
Set-Up: This experiment requires:
A metal track
A cart with a cut
Measuring Pi Lab
09/22/2015
Partners: Yvonne Pablistan, Bailee Rice
Darien Lighthart
Purpose: To understand differences between mean and measured values, and error and
uncertainty by calculating the circumference of circular objects using three different
ARCHIMEDES PRINCIPLE: 01.21.2016
Main Author: Brent Kaplan
Intro and Conclusion: Darien Lighthart
Data and Analysis: Erin Hamilton
Procedure: Amber Davis
Introduction:
The purpose of the lab is to verify Archimedes Principle by testing the specific gravit
RC CIRCUITS LAB
Intro: Brent Kaplan
Procedure & Data Analysis: Darien Lighthart
Data and Main Author: Erin Hamilton
Conclusion: Amber Davis
Introduction:
This labs goal was to establish a relationship between potential difference and time in a resistor-ca
THERMAL EXPANSION OF SOLIDS
Intro and Procedure: Erin Hamilton
Data and Main Author: Amber Davis
Analysis: Darien Lighthart
Conclusion: Brent Kaplan
Introduction:
The purpose of this lab is to discover how the characteristics of different tubes will affec
Physics 123
Ch 38 Practice
1- Specify if the statements below are true or false
a) Electromagnetic waves are transverse
b) Intensity is a concept relevant for both EM waves and for sound waves
c) If the electric field in an EM wave decreases in magnitude
Combination of lenses
1- Two converging lenses
Two converging lenses are 90cm apart. The 30cm focal length lens is to the left of the 15cm
focal length lens. A 15 cm tall arrow is placed 90cm to the left of the 30 cm focal length lens.
Where does the fina
Physics 123
Ch 39 - Practice Problems
1) How tall does a plane mirror need to be in order for you to see your entire
image reflected in it?
2) The critical angle of a certain piece of plastic in air is 37.3. Find its critical
angle if it is immersed in wa