Factoids
Resistivities
at room temperature
The
electromagnetic spectrum
Another nice plot
of the EM spectrum
Magnetic
susceptibilities of some rocks
Some Review Problems
On
static fields
On
dynamic fields
On
radiation and electromagnetism in macroscopic bodies
Thus sayeth Feynman: "...it is not possible to understand the magnetic effects of materials in any honest way from the point of view of classical physics. Such magnetic effects are a completely quantum-mechanical phenomenon. It is, however, possible to make some phoney classical arguments and get some idea what is going on." He does give a few reasons for pursuing classical arguments such as in certain physical situations (plasmas), or for historical reasons, or because classical arguments provide starting guesses. He goes on to "make a series of classical arguments that will confuse you because they will prove different things. Except for the last theorem, every one of them will be wrong. Furthermore, they will all be wrong as a description of the physical world. because quantum mechanics is left out." 34-2.
Readings
This is what you should have already read by the date given
20 January: Chapters 1-6. Skip Chapter 7.
26 January: Chapters 8-9. Skip 8.4. Skip 10-11, we'll
come back to this later. Skip 12.
30 January: Chapters 13-14.
Quiz, 2 February on statics fields.
10 February: Chapter 15 (skip 15-6).
So far this is all review of material on static fields. Time varying fields begin in Chapter 16.
15 February: Chapter 16 is a nonmathematical overview of some of the amazing technological consequences of induced currents. We have done demonstrations of most of these in class (except for superconductivity!). Think back on these examples and how they relate to the discussion in 16.
Skip 17 for the moment. We will come back to this in a few days. We will spend a substantial amount of time on Chapters 18 and 20. We'll skip 19 for now. But I encourage you to read this if you have time. This is one of most interesting chapters in the whole book. But strictly optional.
Chapter 21 is fundamental. It covers solutions of Maxwell's equations and develops the fundamentals of radiation. Be sure you understand 21-4 on the oscillating dipole.
Skip Chapter 22.
March 25-April1. At this point the natural sequence will be to discuss chapters 28-30 in Volume I. These chapters discuss radiation, interference and diffraction. Volume I is on reserve at the library if you don't have a copy. Single slit, double slit, Huygens principle. Computer lab exploring Huygens using Jim Sethna's package.
An interesting digression: Photons shmotons! Starting with Things that really exist.
April 8. Maxwell's equations in dielectrics. Read 32-2 in Volume 2.
April 8&10 Magnetism in matter, Chapter 34 1-4 Volume 2. Skip chapters 35, although 35-6 has a nice discussion of NMR which is one of the hottest new logging tools. Read 36. This describes the introduction of H into Maxwell's equations, as well as a number of important physical effects. Be care that Feynman uses a different definition of H than most people. His has the advantage that H and B have the same dimensions.
Notes on lectures from 4/10 through 4/15 are on reserve at the library.
Mathematica Notebooks
Cool Links
Wave interference demonstrations from CU: Numerous well-done java apps.
Astronomy Picture of the Day: http://antwrp.gsfc.nasa.gov/apod/archivepix.html
Fresnel Diffraction simulator and pictures: http://www.physics.ucla.edu/~dauger/fresnel/
A nifty animation from this site. What you're seeing is an animation
scanning a range of wavelengths for a monochromatic source illuminating
a sort of pie shaped hole.
Refraction Java applet: http://wigner.byu.edu/LightRefract/LightRefract.html
Lots of E&M applets from Japan http://www.bekkoame.or.jp/~kamikawa/java_e.htm
Beautiful color visualization of electric and magnetic guided modes (also Java): http://www.etsit.upv.es/~fernando/java/modocolor/modocolor.html