PHYS209 Assignments

Notice that the due dates of the parts of different assignments overlap. You will usually be working on at least two assignments at once.

A. Read through sections 1-4, 7-9, skipping sample problems if you wish, by Thursday, Feb. 10.

B. Find answers for questions 2, 7, 9, 10, and 11 (pp. 389-390), by Thursday, Feb. 10.

C. Read thoroughly sections 1-4, 7-9 and class notes, including sample problems, and have a list of questions to ask in class on Tuesday, Feb. 15.

D. Get solutions for problems 19, 26, and 51 (pp. 392-394), to hand in by Thursday, Feb. 17. In problem 51, in addition to or as part of what is asked for in the problem, find the differential equation for the motion of the cylinder.

A. Read through sections 2-6, skipping sample problems if you wish, by Tuesday, Feb. 15. Skim the derivation of the equation for waves on a string this time.

B. Find answers for questions 4, 9, 11, and 13 (p. 419), by Thursday, Feb. 17.

C. Read thoroughly sections 2-6 and class notes, including sample problems, and have a list of questions to ask in class on Thursday, Feb. 24. Make sure you understand the derivation of the equation for waves on a string by this time.

D. Read through sections 7-12, skipping sample problems if you wish, by Thursday, Feb. 17.

E. Read thoroughly sections 7-12 and class notes, including sample problems, and have a list of questions to ask in class on Thursday, Feb. 24.

F. Get solutions for problems 14, 27, 38, 39, 43, 46, and 57 (pp, 420-423) to hand in by Tuesday, Feb 29.. If you would like to work a more challenging, interesting problem, try number 32.

A. Read through all sections, skipping sample problems if you wish, by Thursday, Feb. 24.

B. Find answers for questions 3, 8, 11, and 14 (pp. 445 and 446), by Thursday, Feb. 24.

C. Read thoroughly all sections and class notes, including sample problems, and have a list of questions to ask in class on Tuesday, Feb. 29.

D. Get solutions for problems 19, 21, 43, 57, 63, 73, 75, and 95 (pp. 447-452) to hand in by Thursday, March 2..

A. Read through all sections of Chapter 34.

B. In Chapter 34, find answers for questions 1, 6, 8, 11, 12 (pp. 863 and 846) and problem 15 (p. 866).

C. Read through all sections of Chapter 35, skipping sample problems if you wish.

D. In chapter 35, answer questions 4, 7, 8, 12, and 15 (pp. 893-895).

A. Read thoroughly all sections of Chapter 34 and the corresponding class notes, and have a list of questions to ask in class.

B. In chapter 34, work problems 14, 32, 39, 51, 59, 65, 78 (pp. 866-871) [These will be accepted for full credit through March 21].

C. Read thoroughly all sections of Chapter 35 and the corresponding class notes, and have a list of questions to ask in class.

A. In Chapter 35, work problems 12, 17, 33, 39, 41.

C. Read through all sections of Chapter 36, skipping sample problems if you wish.

D. In chapter 36, answer questions 3, 7, 8, 9, 10, 16 (pp. 919, 920).

A. Read thoroughly all sections of Chapter 36 and the corresponding class notes, and have a list of questions to ask in class.

B. In Chapter 36, work problems 8, 15, 29, 39, 53, 69, 77 (pp. 921 - 926).

C. Read through all sections of Chapter 37, skipping sample problems if you wish.

D. In chapter 37, answer questions 1, 4, 7, 11 (pp. 950, 951).

A. Read thoroughly all sections of Chapter 37 and the corresponding class notes, and have a list of questions to ask in class.

B. In Chapter 37, work problems 17, 29, 39, 43, 56 (pp. 952 - 955).

A. Read thoroughly sections 5.1, 5.2, and 5.3 of Ohanian and the corresponding class notes, and have a list of questions to ask in class.

B: Answer the following questions:

1. If you start a double-slit experiment with one of the slits closed, you start with a single-slit pattern. When you then open the second slit, some areas that were bright (receiving photons) turn dark. Where do the missing photons go?

2. If you tune the light in a double-slit experiment from blue to red, what happens to (a) the wavelength of the light, (b) the wavelength of the photons, (c) the energy carried by the light, and (d) the momentum carried by the light?

3. For light going through a single slit in a metal, the electric and magnetic fields will induce eddy currents in the metal near the slit. Qualitatively, what will be the time dependence of those eddy currents?

4. For electrons going through a double-slit arrangement, what if anything will happen to the pattern on the detecting screen if you use eddy currents at the edge of the slits to determine which slit each electron passes through? Why? What will happen if someone else determines which slit the electrons go through but doesn't tell you about his measurements?

5. For the double slit:
   1. Design an experiment to detect which slit an electron passes through without destroying the interference pattern on the detection screen.
   2. Figure out what is wrong with the experiment you designed for part (a).

6. Apart from the intensity (brightness) of the pattern, does the interference pattern in the double-slit experiment depend on the number of particles at a time that are between the slits and the detectors? What if the number of particles there is less than 2?

C: Ohanian, chapter 5, page 167, problems 4, 6, and 8. One electron-volt is the energy gained by a particle of charge e falling through a potential difference of 1 volt.

A. Ohanian, Chapter 5, pp. 167ff # 18, 22, 23, 36. In problem 18, why is there a minus sign in the equation quoted in the problem, whereas in HRW p955 #56, we had the same equation with a plus sign?

B. Read qualitatively Chapter 3 of Ohanian.

A. Read carefully sections 3.3 and 3.4 of Ohanian.

B. Work Ohanian, Chapter 3, pp. 103-104 # 24, 25, 27, and 28.

Work Ohanian, Chapter 3, p. 104, # 31, 33, 34, 36.

Work Ohanian, Chapter 4, pp. 135ff, #6, 9, 24, 28, 30, and 40.

A. Read carefully Ohanian sections 6.1 - 6.5 .

B. Work Ohanian Chapter 6, pp. 209ff, # 4, 6, 11, 17, 18.

Work Ohanian Chapter 6, pp. 209ff, # 20, 22, 24, 32.