PHYS 135: Problem Set 06
Name: ____________________
Multiple choice problems. Circle your answer and explain your reasoning. Your explanation is
worth more than the actual answer.
1.
Explanation:
2.
Explanation:
3.
Explanation:
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PHYS 135: Problem Set 06
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4.
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5.
false
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Name: ____________________
6.
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7.
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PHYS 135: Problem Set 06
Name: ____________________
8.
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9.
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10.
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PHYS 135: Problem Set 06
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11. a) What is the de Broglie wavelength of a 0.6 kg basketball moving 5 m/s?
b) Why don’t we see diffraction effects when a basketball passes through the circular aperture of
the hoop?
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PHYS 135: Problem Set 06
Name: ____________________
12. A scanning microscope is used to look at cell structure with 10 nm resolution. A beam of
electrons from a hot filament is accelerated to 50,000 km/s and then focussed to a small spot on
the specimen.
a) What is the wavelength in nanometers of the beam of incoming electrons?
b) If the size of the focal spot were determined only by diffraction and if the diameter of the
electron lens is one fifth the distance from the lens to the specimen, what would be the minimum
separation resolvable on the specimen? (In practice, the resolution is limited much more by
aberrations in the magnetic lenses and other factors.)
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PHYS 135: Problem Set 06
Name: ____________________
13. Concept Mapping: Finish your "light" concept map that you started on your own and
continued developing in class. Be sure to include at least the new topics that we discussed in
class below in your concept map. Also include any equations that you think are important. I
suggest you construct your concept map (initially) in pencil.
Photoelectric effect
Compton scattering
Absorption/emission spectra
…
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