Can someone point me to some good online resources about Modern Physics?

[threshold]

Here's the description of a class I'm taking next semester:

Electrons, protons, and structure of matter: a historic view. The Rutherford-Bohr atom and elements of quantum mechanics and their applications to atomic, nuclear, and solid state physics. Usually offered every spring. Prerequisite: PHYS-200, PHYS-205, or PHYS-210, or permission of instructor.

 

[jtbell]

Try Hyperphysics, in particular the Quantum Physics, Nuclear Physics and Condensed Matter sections.

 

[Peeter]

Your course sounds a lot like these modern physics lectures on iTunesU

http://deimos3.apple.com/WebObjects/Core.woa/Browse/case.edu.1645433286

(covering introductory relativity, QM, and nuclear physics).

You may be able to prepare by listening/watching some of those. Getting the text that you'll use for your course is probably worthwhile if you haven't done so already.