Discusses the teaching potentialities of scaler-timers in the physics laboratory, and describes the circuitry and design of scaler-timers. (MLH)

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)

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)

Discusses the difficulty of explaining the concept of entropy, and provides exercises, experiments, and discussions concerning entropy. (MLH)

Described are five physics experiments utilizing inexpensive, readily available materials or materials normally found in a physics laboratory. Included are investigations of electrical charge, sound detection, thermal expansion, doppler effects, and the cycloid. (SL)

Presented is the second of a two part series on the use of exponential functions. Discussed, with examples, is the exponential growth of compound interest problems. (SL)

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)

Presented are justifications for including optics in the science curriculum, an outline of optics instruction as presently presented in English secondary schools, and a review of probable future trends in optics instruction. (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)

Presents the entire Advanced Placement Physics C Examination, intended to match the first two terms of a three-to-four term sequence of calculus-based physics courses for physical science or engineering majors. (MLH)

Describes the physics program of the English curriculum project called Computers in the Curriculum. Gives examples of some of the on-line programs that are used in teaching secondary school physics. (MLH)

Discusses textbook errors and alternative explanations concerning Planck's derivation of the distribution function for the energy density of black-body radiation. (MLH)

Describes a low-cost wave analyzer; how to convert an incandescant light bulb to an x-ray tube; how to use an electric toothbrush to generate waves; the use of a light-emitting diode as a point light source; how to rejuvenate helium-neon lasers; and calibration of an ammeter. (MLH)