Physics 251 (Modern Physics)

plus PHY 252 (Modern Physics Lab)

Spring 2008


Instructor: Prof. Chris Jacobsen (Chris.Jacobsen@stonybrook.edu, office D-102, phone 631-632-8093).  Office hours in general: Tuesdays 12:30 - 13:30 or by appointment.  Please feel free to contact me to meet at other times!
Laboratory T.A.: Mr. Stephen Webb (swebb@grad.physics.sunysb.edu ); office S-137A (across from S-137 in the Physics basement)
Course syllabus and further information.
Recitation schedule with links to homework solutions, and PHY 252 lab schedule with links to lab writeups.

Lecture schedule. Mondays and Wednesdays, 15:50 - 17:10, Physics P-130.  This is an approximate schedule; I expect to deviate from it!
Date
Subject
Monday, Jan. 28
Lecture 1: Introduction to the course.  EM waves and relativity. 
Wednesday, Jan. 30
Lecture 2: Relativity II.
Monday, Feb. 4
Lecture 3: Relativity III
Wednesday, Feb. 6
Lecture 4: Relativity IV.
Monday, Feb. 11
Lecture 5: Relativity V; Planck and the blackbody spectrum. 
Wednesday, Feb. 13
Lecture 6: More on blackbody.  Photons. "First impressions" book report due.
Monday, Feb. 18
Lecture 7: X rays and the Compton effect; Thomson and electrons
Wednesday, Feb. 20
Guest lecture: Prof. Peter van Nieuwenhuizen on general relativity
Monday, Feb. 25
Lecture 8: From plum pudding to the fly in the cathedral (Thomson to Rutherford). 
Wednesday, Feb. 27
Lecture 9: Rutherford scattering and the nucleus.
Monday, March 3
Lecture 10: The Bohr model, and de Broglie waves.
Wednesday, March 5
Lecture 11: Wave equations and complex notation; the Schrödinger equation for matter waves.
Monday, March 10
Exam 1 on Chapters 1-3.  Exam and solutionsEquation sheet.  Previous exams and solutions: spring 2007, fall 2006.
Wednesday, March 12
Lecture 12: Infinite quantum well (particle in a box).  Interpretation of wave functions.
Monday, March 17
No class. Spring break.
Wednesday, March 19
No class. Spring break.
Monday, March 24
Lecture 13: Interpretation of wave functions.  2D infinite quantum well.  
Wednesday, March 26
Lecture 14: Heisenberg uncertainty relationship.  Quantum averages and fluctuations.  Quantum mechanical harmonic oscillator. Finite square well.
Monday, March 31
Lecture 15: Schrödinger equation solution for the atom
Wednesday, April 2
Lecture 16: Schrödinger equation solution for the atom II
Monday, April 7
Lecture 17: Hydrogen atom III. Quantum statistics.
Wednesday, April 9
Lecture 18: Quantum statistics. 
Monday, April 14
Lecture 19: Lasers; Fermi sea.
Wednesday, April 16
Lecture 20: Band theory, semiconductors I.
Monday, April 21
No classes.  Passover.  Prof. Jacobsen office hours: Wednesday, April 16 12:30-13:30, and Friday, April 18 10:00-13:00.
Wednesday, April 23
Exam 2 on chapters 4-9.  Equation sheet.  Solutions. Previous exams and solutions: spring 2007, fall 2006.
Monday, April 28
Lecture 21: Semiconductors II.  The nucleus.
Wednesday, April 30
Lecture 22: Radioactive decay and dating; shell and liquid drop model. 
Monday, May 5
Lecture 23: Nuclear fission and fusion, reactors, etc.  Final book report due by Monday, May 5 at 5 pm (email is fine).
Wednesday, May 7
Lecture 24: Health effects of radiation; nuclear fusion; nuclear weapons.
Monday, May 12
Lecture 25: Review.
Wednesday, May 14
17:00-19:30
Final exam (5 pm - 7:30 pm, in Physics P-130 which where we've met for lectures all semester).  Equation sheetExam and solutions.  Previous exams and solutions: spring 2007, fall 2006.

Histograms: all three exam scores, and total score for course, plus letter grades.
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Recitation schedule
Recitations meets Tuesdays 08:20 - 09:15, Physics D-122. 

Homework is due by noon on Thursday (e.g., Feb. 7 for the Feb. 5 recitation assignment).  Hand the homework in to the mail slot of Stephen Webb (right hand side, physics mail room, ground floor across from the elevators), or else slip it under his door in office S-137A (Physics basement, across from S-137).
Date
Homework due
Tuesday, Jan. 29
No recitation
Tuesday, Feb. 5
Homework assignment, solutions.
Tuesday, Feb. 12
Serway problems 1.24, 1.26, 1.33, 1.34, 1.36 and 2.6, 2.8, 2.11, 2.14, 2.15, 2.18.  Solutions.
Tuesday, Feb. 19
Serway problems 2.21, 2.23, 2.27, 2.28, 2.31, 2.33 and 3.6, 3.8, 3.12, 3.14, 3.15, 3.20.  Solutions.
Tuesday, Feb. 26
Serway problems 3.22, 3.24, 3.25, 3.28, 3.30, 3.36, 3.38, 3.39, 3.44, 3.46Solutions.
Tuesday, March 4
Serway problems 4.3, 4.4, 4.5, 4.8, 4.9, 4.13, 4.14, 4.16, 4.19, 4.24, 4.28.  Solutions.
Tuesday, March 11
No homework; exam 1 on March 10.
Tuesday, March 18
Spring break.
Tuesday, March 25
Serway problems 4.33, 4.34, 4.43, 4.44, 5.2, 5.3, 5.10, 5.14, 5.31, 6.5, 6.6.  Solutions.
Tuesday, April 1
Serway problems 5.19, 5.25, 5.26, 5.33, 6.9, 6.12, 6.16, 6.19, 6.25, 6.32.  Solutions.
Tuesday, April 8
Serway problems 6.23, 8.10, 8.14, 8.16, 8.25, 8.26, 9.5, 9.12, 9.21 plus the two problems below.  Solutions.
  1. An electron is placed in an infinite potential box of width 0.2 nm.  Calculate the ground state energy of the state.  Then, assume that the potential of the box is not infinite but 2.0 eV.  Calculate the 1/e tunneling width δ of the box, use it to generate a modified width, and calculate the approximate energy of the state with this modification.
  2. What is the likelihood of a student tunneling through a wall that is 2 nm thick (about 10 atoms) and 2 meters high? Consider the student to have a mass of 80 kg, and to run at the wall with a velocity of 5 m/sec. Calculate the decline in the student's probability of being on the far side of the wall versus the near side. Of course another way for the student to go through such a thin wall is to rip through it...
Tuesday, April 15
Serway problems 10.2, 10.3, 10.6, 10.9, 10.15, 10.21, 12.16, 12.18. Solutions.
Tuesday, April 22
No homework, and no recitation meeting; exam April 23.  Prof. Jacobsen office hours: Wednesday, April 16 12:30-13:30, and Friday, April 18 10:00-13:00.
Tuesday, April 29
Serway problems 13.1, 13.5, 13.9, 13.16, 13.17, 13.22, 13.26, 13.30, 13.33, 13.34, 13.41, 13.44, 13.45.  Due FRIDAY, MAY 2, by 3 pm.  Solutions.
Tuesday, May 6
Serway problems 14.4, 14.7, 14.22, 14.24, 14.28, 14.30, 14.35.  Due FRIDAY, MAY 9, by 3 pm.  Solutions.
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PHY 252 Lab schedule (A-133.  Section 1: Tuesdays 14:20-16:20.  Section 2: Tuesdays 18:00-20:00)  Notes on error analysis are here, and suggestions on writing lab reports are hereHistogram of final scores.
Date
Homework due
Tuesday, Jan. 29
No lab
Tuesday, Feb. 5
Lab 1: Michelson Interferometer I
Tuesday, Feb. 12
Lab 2: Micrometer nonlinearities; searching for the Aether Wind
Tuesday, Feb. 19
Lab 3: Measurement of e/m for electrons
Tuesday, Feb. 26
Lab 4: Measurement of the charge of the electron
Tuesday, March 4
No lab; study for exam.
Tuesday, March 11
Lab 5: The Photoelectric effect 
Tuesday, March 18
No lab; spring break
Tuesday, March 25
Lab 6: Bragg scattering
Tuesday, April 1
Lab 7: Emission spectrum of hydrogen.
Tuesday, April 8
Lab 8: Geiger counter
Tuesday, April 15
Lab 9: Radioactivity
Tuesday, April 22
No lab; study for exam.
Tuesday, April 29
Make-up lab
Tuesday, May 6
No lab
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