An introduction to fundamental principles of physics used in describing molecules, atoms and nuclei. The course includes study of special relativity, introductory quantum mechanics, and applications of these theories. Experimental work in selected areas is performed. Completing the course allows the student to describe important definitions and relationships in each of the areas studied, understand historically important experiments which suggested each of the major theories, and perform calculations which apply the major theories discussed. Prerequisite: Physics 107, 108 (or 201, 202); Mathematics 235, 236. Offered alternate years.