Chapter 26
Drop a rock in a pool of water. What do you see?
When we get far enough away from the source of the wave, it flattens out. We call this a
PLANE WAVE.
REFLECTION:
In geometrical optics, we i
Chapter 27
THE HUMAN EYE:
1. The greatest refraction of light occurs at the air (n = 1.00) CORNEA ( n = 1.38 ) interface.
2. Secondary refraction occurs at the AQUEOUS HUMOR (n = 1.33) LENS (n = 1.40)
ELECTROMAGNETIC WAVES:
In Physics I, we learned that there are two types of waves: longitudinal and transverse. EM
waves are the transverse type, meaning that the direction of the vibration or oscilla
Chapter 23
Define: Magnetic Flux, = B A cos T m2 = 1 Weber (Wb)
Simply put, flux is a measure of how many B-field vectors pierce an open area times the
size of the area available to it, and also how s
Chapter 22
What is magnetism? It was named after the ancient city of Magnesia in Asia Minor.
Some 2000 years ago, the Greeks observed the properties of lodestone (its also found
in Lancaster, PA!) By
Chapter 21
Definition of electric current: I
Q C
1 Amp
t s
Current is simply charges in motion! (Mostly, but not ALWAYS, electrons).
Effects of current on the human body:
1 mA you can just feel it.
Chapter 20
Review gravitational/spring potential energy and conservative forces (U only depends
on the beginning/ending points) from last semester.
Example: If a rock is lifted in a gravitational fiel
19-21. When two identical ions are separated by a distance of 6.2 10 10 m, the
electrostatic force each exerts on the other is 5.4 10 9 N. How many electrons are
missing from each ion?
Picture the Pro
30-27: You have two lightbulbs of different power and color, as indicated in Figure 30
21. One is a 150-W red bulb, and the other is a 25-W blue bulb. (a) Which bulb emits
more photons per second? (b)
29-43: An electron moves to the right in a laboratory accelerator with a speed of 0.84c.
A second electron in a different accelerator moves to the left with a speed of 0.43c
relative to the first elec
28-8. A microphone is located on the line connecting two speakers that are 0.845 m apart
and oscillating 180 out of phase. The microphone is 2.25 m from the midpoint of the
two speakers. What are the
26-32:
During a daytime football game you notice that a players reflective helmet forms an
image of the Sun 4.8 cm behind the surface of the helmet. What is the radius of curvature
of the helmet, assu
26-93:
The focal length of a lens is inversely proportional to the quantity (n 1), where n is the
index of refraction of the lens material. The value of n, however, depends on the
wavelength of the li
25-50 IP Electromagnetic wave 1 has a maximum electric field of E 0 52 V / m, and
.
electromagnetic wave 2 has a maximum magnetic field of B0 15 T. (a) Which wave has
the greater intensity? (b) Calcul
24-6
A 75-watt lightbulb uses an average power of 75 W when connected to an rms voltage of 120 V. (a)
What is the resistance of the lightbulb? (b) What is the maximum current in the bulb? (c) What is
Chapter 28
SUPERPOSITION AND INTERFERENCE:
For (b), which peak is which? They all look the same.
1. Addition of ordinates when adding two waves their y-coordinates (amplitudes) add together
at every p
CHAPTER 30
Ideal blackbody: absorbs all light that is incident on it. My grandparents coal furnace. Objects
that absorb well also emit (radiate) well. The color of the emitted ratiation will change as
Physics 102
FORM 0
[l] Two point charges of +60.0 [J,C and -12.0 /C are separated by a distance of 40.0 cm. A + 7.00 /xC charge is placed midway between these two charges. What is the electric force a
Physics 102
FORM 0
[l] What is the focal length of the combined lenses with individual powers of 8.0 diopters and 4.0 diopters? _ [A] 8.0 cm [B] 5.6 cm [C] 6.0 cm ([Dp.S cm [E] 4.0 cm [2] A little kno
Physics 102
FORM 0
[1] Positively charged particles, moving horizontally along the northward direction with a distribution of velocities, enter a region of space where both an electric and a magnetic
Physics 102
FORM 0
[1] Two objects, A and B, are rubbed together. As a result, object A acquires an excess negative charge while object B becomes positively charged. In comparison to their masses befo
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