Lab Report
I. Introduction
A couple of sentences introducing
the lab and the main topic.
II. Procedure
Leave blank. (Simply indicate where
it would be.) (Needs to be more thorough on
the portfolio.)
III. Data
(Charts and graphs)
IV. Calculations (Need a s
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Assignment Light A
Convert the following E/M waves.
a. 758 nm to frequency
b. 2.52 x 1012 Hz to wavelength
What is the intensity of a 60.0 W point source 1.25 m away?
What is the critical angle of light moving from wate
Assignment Chap 23
1)
A 75.00 resistor, a 95.00 mH inductor, and a 55.00 F capacitor are connected
in series with an ac source with amplitude of 50.00 V.
a)
What is the natural angular frequency?
If the source frequency is 50.00 Hz:
b)
What is the driving
Assignment Chap 21
1)
A wire carrying 20.0 A has a length of 0.350 m. There is a uniform magnetic field
at 35 degrees to the wire of 0.0250 T. What is the magnetic force on the wire.
2)
A uniform magnetic field points up out of a plane. A rectangular loop
1)
2)
3)
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5)
1)
2)
3)
Assignment Light part B
What is the distance between first order maxima from an interference pattern
from two slits? The wavelength of light is 546 nm, the slit separation d is
0.120 mm, and the slit-screen separation is 55 cm. (Hi
Physics 161
Portfolio Guidelines
General
The portfolio is a collection of 4 items, not from any other assignment. They
demonstrate your understanding and progress with Physics concepts. One item must be a
biography of a Physicist. You chose the other 3 of
v=f
p = U/c
(absorbed light)
p = 2U/c
(reflected light)
P (pressure) = I/c
(absorbed light)
P (pressure) = 2 I/c (reflected light)
I = I0 cos
n = c/v
n1 sin 1 = n2 sin 2
Sin c = n2/n1
1/p + 1/i = 1/f
d sin = m
(m = 0, 1, 2, 3,)
d sin = (m + )
a sin = m
Equations
Kinematic equations
v=v +at
x = x + (v + v) t
x = x + v t + a t2
v2 = v 2 + 2 a x
0
0
0
0
0
0
v =v
av
constant
= x/t
Forces
F=ma
( F = m a)
W = mg
Fr = N
F=-kx
Fcp = m v2/r
acp= v2/r
(weight)
(friction)
(spring)
(centripetal)
Work and Energy
W=F
Assignment Chap 19
1)
Two charges of +0.250 mC are placed at the points (1.25 mm, 0 mm) and
(-1.25 mm, 0 mm). A third charge of -0.450 mC is placed at the origin. Find the potential
at a point P (0 mm, 1.25 mm)
2)
Find the potential energy required to put
Assignment Chapter 20
1)
2)
3)
4)
5)
6)
7)
a)
d)
g)
j)
A current of 2.50 A flows through a circuit for 8.00 minutes. The current is
supplied by a 12.0 V battery. How much energy is used?
A total resistance of 12.0 is created when two resistors are placed
Magnetism
Magnets
o Magnets have two sides.
o One side is called North, the other
South.
o Opposite sides attract.
NS
o Same sides repel.
NN
SS
o The Earth has a magnetic field.
The North magnetic pole is
actually a South pole.
The South magnetic pole i
Chap 20
Electric Current
If we take 2 charged balls with different
charges and we connect a wire between the
balls, the electrons will be free to move from
one ball to the other ball.
This is electric current.
o Basics
Symbol:
I, i
Unit: Ampere, Amp, A
Electric Charge and Fields
Electric Charge
o Electric charge like mass is a fundamental
property of nature.
o Unlike mass, charge comes in 2 forms positive
(+) and negative (-).
o Also, where gravity is always attractive; electric
charge can be repulsive
Chapter 19
Electric Potential Energy
o Basics:
Symbol:
U
Unit: Joule, J
Scalar
o Electrostatic force is conservative.
o If a charge is placed in a constant E
field, it will experience a Force.
F=qE
If that charge is moved, work will
be done.
W=-qEd
Chapter 22 Induction
Review:
1) There are connections between
magnetic and electric fields.
2) Moving charges create magnetic
fields.
Induced Emf
(Draw a picture of two circuits.
One (primary) is a switch, an Emf, a
resistor, and a coil. The other
(secon
Chapter 27
Wave/Ray
o Although we have treated light like a
ray or beam, it also has
characteristics of a wave.
o When two waves come together,
they will follow the principle of
superposition.
Superposition
o The net displacement of a
combination of waves
Chapter 25/26
Reflection
o When a traveling E/M wave meets
an interface between 2 different
media, it may be reflected, refracted,
absorbed or a combination of all
three.
o Depends on:
Angle of incidence
Types of materials
Indexes of refraction
o Law o
Chapter 23
Alternating Current
o Alternating current or ac for short
o Alternating current is energy
supplied by a current that oscillates
and changes direction.
o The frequency of oscillation in the
US is 60 Hz.
o What is the angular frequency in the
US?
Chapter 24
Electromagnetic waves
o Changing magnetic fields create
electric fields.
o Changing electric fields create
magnetic fields.
o Here we have a sort of symmetry.
o Together, the electric and magnetic
fields acting together can produce a
traveling