Physics 321
Introduction to Modern Physics
Plan II


The discoveries and the methods of analysis that are the basis of Twentieth Century Physics have dominated our lives and in many cases set the tone of our intellectual debate. Discoveries from quantum mechanics are the basis for all the current work in the development of modern materials and in modern electronics devices such as transistors. The modern view of space-time is a rich structure that allows for marvelous objects such as black holes and even allows a solid basis for our understanding of the origin of the universe. Unfortunately, in most undergraduate University curricula, this material is not covered. This omission is usually due to the need to prepare the students in both the requisite classical physics and mathematics as a background for other course work. This course covers the modern subjects without the use of sophisticated mathematics but in a coherent and correct presentation of the modern physics. The emphasis in the course will be on the conceptual development of the ideas. The course begins with a general review of several of the basic ideas that are relevant to all of physics but quickly relates them to discoveries made in the twentieth century. We start the discussion of the current approach to microscopic matter. Beginning with Planck's work on black body radiation and the Einstein on the photoelectric effect, we will develop the modern theory of light and matter. From this we will study the modern theory of space and time. This is covered using the geometrical concepts to outline the basic ideas of special and general relativity. This is followed by a descriptive analysis of some of the more spectacular of the objects predicted by these theories. If time allows, this will be followed by connecting the two threads of space time and quantum mechanics will. Again the emphasis in all our discussion is on conceptual foundations. In addition, the content of the course allows for discussions of important philosophical issues such as "What is energy and matter?" and significantly the role of mathematics.


The course is being taught by Professor Austin M. Gleeson of the Department of Physics. It is described in a First Class Handout. It has two lectures a week; a syllabus is available. There are notes available for the class at the Coop and on the web. Each student must also attend one discussion section per week. There is homework every week consisting of assigned problems and take-home laboratories. Some of the problems and all of the laboratories deal with general science competency. There is a list of "Things that everyone should know." In addition, there a description of the physics that you should know before taking this course. There is also a set of notes that includes some of the above material but is also summary of the material covered by the course. There are two quizzes and a final. There is also a requirement for a book report. A reading list is available. Old quizzes are available. Students with a weak background in physics from high school are encouraged to take the special section of Phy 306 for Plan II students before enrolling in this course.