Schedule for Physics 704 - Spring 2010

PHYS 704 Home Page

All problem numbers refer to the third edition of Jackson!

Day, Date (Mon., dd, yyyy) Lecture Content and Homework Assignment
Mon. Jan. 11, 2010 Lecture: Elementary discussion of waves.
Homework (HW #1: due 1/20): Consider radiation from a standard 100W light bulb at the origin. You are standing 1 km from the bulb in the x-direction. Consider the 15% of the energy that goes into visible light and assume it is monochromatic at 6000 Angstroms. What is
  1. The amount of energy flowing past you? (Use units: per meter-squared, per second, etc.)
  2. The density of radiation energy around you?
  3. The pressure you feel due to the radiation?
  4. The speed at which radiation goes past you?
  5. The rms electric field due to the radiation if it were a single plane wave?
  6. The rms magnetic field due to the radiation if it were a single plane wave?
  7. If you were told the radiation is plane polarized, how would you determine the direction of polarization?
  8. The radiation is polarized in the z-direction. Write down the electric field at your location, as best as you can.
  9. The radiation is polarized in the z-direction. Write down the magnetic field at your location, as best as you can.
  10. The radiation is polarized in the z-direction. Write down the Poynting vector at your location, as best as you can.

Wed. Jan. 13, 2010 Lecture: Orthogonality condition. Connection between magnetic and electric fields. Inhomogenous waves. Plane and Circular Polarization.
Homework (HW #1: due 1/20): Griffiths 9.33.
Thu. Jan. 14, 2010 Lecture: Griffiths problems 9.9, 9.11
Homework: None
Fri. Jan. 15, 2010 Lecture: Reflection and Refraction of Electromagnetic Waves. Refractive indices.
Homework (HW #2: due 1/25): Jackson 7.2.
Wed. Jan. 20, 2010 Lecture: Refractive index for dielectrics at low, medium and high frequencies. Absorption. Conductivity.
Homework (HW #2: due 1/25): Jackson 7.4.
Thu. Jan. 21, 2010 Lecture: Dispersion relation for plasmas and metals. Group and phase velocity. Group velocity for electromagnetic waves.
Homework (HW #2: due 1/25): Griffiths 9.23.
Fri. Jan. 22, 2010 Lecture: Introduction to Waveguides. Boundary conditions. Maxwell equations applied to waveguides.
Homework (HW #3: due 2/1): None.
Mon. Jan. 25, 2010 Lecture: Waveguides, continued.
Homework (HW #3: due 2/1): Jackson 8.4a.
Wed. Jan. 27, 2010 Lecture: Waveguides, concluded.
Homework (HW #3: due 2/1): Jackson 8.5a.
Fri. Jan. 29, 2010 Lecture: Oral exams: Chapters 7, 8.
Homework (HW #4: due 2/8): Work out the electric and magnetic fields for TEM mode propagation in a cylindrical, coaxial conductor waveguide (Griffiths section 9.5.3). Also, solve Griffiths problem 9.31.
Mon. Feb. 1, 2010 Lecture: Conservation Laws: Griffiths Chapter 8.
Homework (HW #4: due 2/8): Show that the Maxwell Stress Tensor is a tensor.
Wed. Feb. 3, 2010 Lecture: Energy and Momentum conservation for E.M. Fields. Examples of the Poynting vector and the Maxwell Stress Tensor.
Homework (HW #4: due 2/8): Griffiths 8.5.
Fri. Feb. 5, 2010 Lecture: Griffiths problem 8.4. Angular momentum in electromagnetic Fields.
Homework (HW #5: due 2/15): Griffiths 8.10.
Mon. Feb. 8, 2010 Lecture: Radiation from Radiating Systems.
Homework (HW #5: due 2/15): "Simple Radiating Systems"
(a) Prove the statement in the second sentence after Jackson eq. (9.8), where he says "It is easy to show that the fields ..."
(b) Complete all the steps in the derivation of Jackson eq. (9.18) from eq. (9.13).
Wed. Feb. 10, 2010 Lecture: Electric Dipole Radiation and the Larmor Formula.
Homework (HW #5: due 2/15): Jackson 9.7(a). Jackson 9.12 using P1 instead of P2.
Fri. Feb. 12, 2010 Lecture: Radiation from a Short, Center-fed Linear Antenna. Magnetic Dipole and Electric Quadrupole Radiation.
Homework (HW #6: due 2/22): Jackson 9.15.
Mon. Feb. 15, 2010 Lecture: The elements of diffraction: diffraction from single, double and multiple slits, and from a circular aperture. Fraunhofer vs Fresnel diffraction.
Homework (HW #6: due 2/22): Derive the N-slit diffraction formula.
Wed. Feb. 17, 2010 Lecture: Scalar Diffraction theory. Derivation of the Huygens-Fresnel principle.
Homework (HW #6: due 2/22): Jackson 10.11 a, b.
Fri. Feb. 19, 2010 Lecture: Babinet's principle of complementary screens. Example problem: diffraction on axis of a circular aperture / disk.
Homework (HW #7: due 3/1): "Rectangular Aperture". Work out the diffraction pattern when a plane wave is incident normal to a rectangular aperture and the Kirchoff approximation applies.
Mon. Feb. 22, 2010 Test 1: Covers all Jackson Chapters 7, 8, 9 and Griffiths Chapter 8 material that we studied until and including on Fri., Feb. 12.
Homework (HW #7: due 3/1): None.
Wed. Feb. 24, 2010 Lecture: None (preponed - complete).
Homework: None.
Fri. Feb. 26, 2010 Lecture: None (preponed - complete).
Homework: None.
Mon. Mar. 1, 2010 Lecture: Gaussian units. See
The wave equation in a new reference frame using Galilean and Lorentz transformations.
Homework (HW #8: due 3/15): Jackson 11.1.
Wed. Mar. 3, 2010 Lecture: Invariance and Covariance revisited. Inertial reference frames. Events. Inverse Lorentz transformation.
Homework (HW #8: due 3/15): Show that the gradient of the potential in spherical coordinates equals that in Cartesian coordinates.
Fri. Mar. 5, 2010 Lecture: Invariant length of 4-vectors. Inner products (dot products) of 4-vectors and their invariance. Rest Frames and Proper time. 4-velocity, 4-momentum. The Doppler Effect.
Homework (HW #9: due 3/22): Jackson 11.6.
Mon. Mar. 15, 2010 Lecture: Lorentz transformations in action: Length contraction and time dilation illustrated using relativity problems.
Homework (HW #9: due 3/22): Jackson 11.7.
Wed. Mar. 17, 2010 Lecture: General Lorentz Transformation. Time-like, Space-like and Light-like intervals. Velocity addition formula. Covariant formulation of laws. Non-relativistic limit of laws.
Homework (HW #9: due 3/22): Jackson 11.3.
Fri. Mar. 19, 2010 Lecture: Transformation of coordinates of accelerating rockets.
Homework (HW #10: due 3/29): Jackson 11.4.
Mon. Mar. 22, 2010 Lecture: Simple Lorentz transformation problems.
Homework (HW #10: due 3/29): Griffiths, Elementary Particles, 3.5.
Wed. Mar. 24, 2010 Lecture: More relativstic energy-momentum problems.
Homework (HW #10: due 3/29): Griffiths, Elementary Particles, 3.23, 3.24.
Fri. Mar. 26, 2010 Lecture: Contravariant and covariant 4-vectors. The metric tensor. Higher rank tensors. Contraction of indices.
Homework (HW #11: due 4/5): Consider the Cartesian and polar coordinates of position vectors in two dimensions. (a) Define xμ and its differential dxμ in both coordinate systems. (b) Find the (Lorentz-like) matrices which transform dxμ between the two frames. (c) Using the invariant interval ds² find also the metric tensor with both indices contravariant and with both indices covariant. (d) Find the covariant vector dxμ in polar coordinates. (e) Verify that ds² obtained from squaring dxμ is the same as ds² obtained from squaring dxμ.
Mon. Mar. 29, 2010 Lecture: Covariant formulation of electrodynamics: The contravariant form of the 4-gradient, 4-force, transformation of forces, 4-current.
Homework (HW #11: due 4/5): Griffiths (Electrodynamics) 5.19.
Wed. Mar. 31, 2010 Lecture: Covariant formulation of electrodynamics: The d'Alembertian, 4-potential, source equations in relativity, gauge conditions, the antisymmetric electromagnetic rank-2 tensor Fμν. Lorentz transformations of electric and magnetic fields. A paradox: charge near a current-carrying wire. Relativistic run through the rain.
Homework (HW #11: due 4/5): Jackson 11.13.
Fri. Apr. 2, 2010 Lecture: Lorentz covariance of field equations. Brief review.
Homework (HW #12: due 4/12): None.
Mon. Apr. 5, 2010 Test 2: Covers Diffraction and Relativity, including all material covered in lectures up to and including Mar. 31.
Homework (HW #12: due 4/12): Jackson 11.14.
Wed. Apr. 7, 2010 Lecture: The Dual tensor, Maxwell equations in covariant form, Lorentz Force law in the extreme relativistic limit. 4-vector for Spin.
Homework (HW #12: due 4/12): Jackson 11.17.
Fri. Apr. 9, 2010 Lecture: The spin 4-vector. The BMT equation.
Homework (HW #13: due 4/19): None.
Mon. Apr. 12, 2010 Lecture: Muon spin precession.
Homework (HW #13: due 4/19): Starting from the BMT equation (11.164), derive equations 11.170 and 11.171. Do not skip any steps (show all work).
Wed. Apr. 14, 2010 Lecture: Measuring (g-2) for muons. Thomas Precession.
Homework (HW #13: due 4/19): Jackson 12.11.
Fri. Apr. 16, 2010 Lecture: Lagrangians for free particles and for particles in an electromagnetic field.
Homework (HW #14: due 4/26): Add the free field term mentioned at the end of class and, by considering variations of the Lagrangian with respect to the 4-potential, derive the field equations for the electromagnetic field.
Mon. Apr. 19, 2010 Lecture: Energy loss of charged particles in media: an introduction.
Homework (HW #14: due 4/26): Jackson 11.26.
Wed. Apr. 21, 2010 Lecture: Energy loss, continued.
Homework (HW #14: due 4/26): Derive the relation between the impact parameter b and the scattering angle θ given at the beginning of Jackson's problem 13.1.
Fri. Apr. 23, 2010 Lecture: Dipole Radiation revisited. Radiation from an accelerating charge.
Homework (HW #14: due 4/26): Derive the electric and magnetic fields of a moving charge, i.e., equations (14.13) and (14.14), from the 4-potential given as equation (14.8). [This approach, different from what Jackson does in section 14.1, is used by Griffiths in section 10.3.2.]
Mon. Apr. 26, 2010 Lecture: Relativistic generalization of the Larmor formula. Application to particle accelerators.
No Homework.
Tue. May 4, 2010
9:00 AM - 12:00 noon
FINAL EXAM: Covers ALL material!

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