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Final Exam Review
Phys 222 – Supplemental Instruction
Some Resources
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Academic Success Center (google ASC ISU)
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Test preparation, stress strategies
Old Exams
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Especially those from this semester!
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Quizzes, Recitation Wk, Online Homework
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Supplemental Instruction
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Worksheets on pretty much every topic (google SI ISU)
Internet Resources
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‘The Physics Classroom’ – lenses, interference, diffraction
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Khan Academy
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Sec1
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In a homogenously charged solid sphere with
radius R and charge density ρ a spherical cavity is
cut out. The radius of the cavity is b, and its
center is at a distance a from the center of the
sphere. What is the electric field inside the
cavity?
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Sec 2
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Solve for the currents in each branch
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+
+
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_
_
l
l
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l
1) Which direction
_
does current flow in
the inductor?
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The switch has been
closed for a long
time. Someone then
comes along and
opens the switch.
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Just after it is
opened:
2) What is the
energy stored in the
inductor?
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Sec. 3
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Conceptual Break
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Unpolarized light that goes through a series of 4 polarizers, each 30
degrees offset will have zero intensity after the fourth polarizer since
the first and last polarizing axes are perpendicular.
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To solve for a constructive interference on a diffraction grating, the
formula dsin(θ) = mλ can be used.
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For diffraction, m denotes the center of the mth order maxima.
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The wavelength of the radiated photon is larger for an electron falling
n=4 to n=3 than n=2 to n=1.
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A mirror is used to produce a virtual image that is 5.00
times bigger than the object. If the focal length of the
mirror is 100 cm, where will the image be located?
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Consider a setup of Young’s double slit experiment where
10mm slits are separated by 15mm. If yellow light
(wavelength 580nm) is shone on the slits, about how many
interference maxima fall between the upper first and
second diffraction bands?
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Two converging lenses, with the focal length f1 = 10 cm
and f2 = 15 cm are placed 40 cm apart. An object is
placed 60 cm in front of the first lens.
a) Find the position of the final image formed by the
combination of the two lenses.
b) Find magnification of the final image formed by the
combination of the two lenses.
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Natural light is incident on a thin film of crude oil (n =
1.7) floating on a water surface (n = 1.33). The thickness
of the film is 80nm. What color will you primarily see?
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A beam of x-rays with wavelength 0.6nm scatters from
electrons. At what angle would the detector measure
0.605nm scattered x-rays?
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