Discusses three theories used to explain the interaction of electromagnetic radiation with matter: the multiphoton theory, the cascade theory, and the effective photon theory. (MLH)

Discusses how color-coded overhead transparencies of computer-generated dot-density diagrams can be used to illustrate hybrid orbitals and the principle of the indistinguishability of electrons. (MLH)

Discusses planning for non-structural laboratory items, such as desks, instruments, and high purity water systems. (MLH)

Describes the construction of simple microwave sources of centimeter wavelength with bulk-effect diodes, and accessory equipment for experiments and demonstrations in physical optics. (MLH)

Describes a quantum-mechanical theory using a density matrix for electrical conductivity in the presence of a magnetic field. (MLH)

Describes a three-semester, self-paced astronomy course for nonscience majors, designed to handle large enrollments with a successful completion rate as high as in a lecture format. (MLH)

Summarizes the results of a student opinion questionnaire that was distributed to students of a PSI (Personalized System of Instruction) astronomy course for seven consecutive semesters after finishing the course. (MLH)

Suggests several mechanisms for catalysis by metal ion complexes. Discusses the principal factors of importance in these catalysis reactions and suggests reactions suitable for laboratory study. (MLH)

Presents an inorganic oxidation-reduction kinetics experiment, and describes a low cost (less than $50) modification of the Bausch and Lomb Spectronic 20 Colorimeter which will provide a linear output in absorbance. (MLH)

Illustrates the mathematical relationships between the enthalpy, free energy, and entropy of a chemical reaction using the first and second laws of thermodynamics. (MLH)

Describes a computerized test administration procedure that solves the problem of providing enough different tests for a self-paced chemistry course. The computer randomly generates a new test for each student from a bank of test items, then grades the test, and gives immediate feedback to the student. (MLH)

Secondary and college level students were queried as to which fundamental physics concepts were the most difficult to understand. Concepts reported as most difficult included: difference between mass and weight, magnification, indirection, the idea of fields, and potential difference. (SL)

Described is the use of computer graphics terminals to present diagrams relating to physics concepts. (SL)

Presented is the second of a two-part article describing the introductory undergraduate physics course taught at the University of Liverpool, England. This part of the article concentrates upon the laboratory aspect of the course. (SL)

This article provides resource materials teaching astronomy. Included are references to laboratory manuals, articles, films, telescopes, handbooks, and atlases. Each reference is classified as elementary, intermediate or advanced. (SL)