Classifies experimental error into two main groups: systematic error (instrument, personal, inherent, and variational errors) and random errors (reading and setting errors) and presents mathematical treatments for the determination of random errors. (PR)

Describes the use of laboratory equipment to demonstrate (1) the interference of light coming from an air wedge, (2) the generation of gas-filled soap bubbles, and (3) the generation of beats with a ripple tank. (LC)

Describes the construction and use of an inexpensive, vacuum furnace designed to produce F-centers in alkali halide crystals by additive coloration. The method described avoids corrosion or contamination during the coloration process. Examination of the resultant crystals is discussed and several experiments using additively colored crystals are…

Describes the construction and use of an apparatus for the free suspension of charged particles and droplets in the range 5-200u and for their study with respect to charge and mass and their variations with time in various gaseous environments. High-speed photography is used to determine the motion of particles. (LC)

Describes the equipment and procedures used to demonstrate (1) light interference with teacher-made photographic film gratings, (2) the minimum angle of deviation for the various lines of a spectrum, and (3) electrostatic phenomena. Written for the high school physics teacher. (LC)

Presents a demonstration apparatus for Kepler's three laws of planetary motion consisting of an air-supported "satellite whose orbit on a level table surface is determined by an inverse square force generated by a Peaucellier linkage and long spring. The device can also be used to illustrate centrifugal force, statics, friction, momentum and…

States the philosophy behind the Harvard Project Physics (HPP) film program. Describes the three long HPP films. Lists the 48 color film loops covering six broad topics, primarily motion and energy. The 8-mm silent loops are synchronized with the text materials. Explains some of the pedagogical possibilities of these film loops. (RR)

Explains the Commission on College Physics' (CCP) change in priorities from preparing future physicists toward providing more appropriate physics courses for the nonscience college students. Discusses the development of the CCP conference which lead to the Physical Science for Nonscience Students (PSNS) project. Describes the activities which have…

Describes the antiscientific movement and the university's roles in meeting this challenge. Presents segments from his book, Modern Physics and Antiphysics," which strives to find a common ground between the humanist and the scientist where both will benefit. Discusses modern physics' relationship to human problems and how scientific reasoning…

Describes student experiment in measuring heat conductivity according to Kohlrausch's method. Theory, apparatus design, and experimental procedure is outlined. Results for copper are consistent to within 2 percent. (LC)

Presents the second in a series of articles in which problems related to introductory physics courses are presented. The twenty problems deal with nearly all aspects of physics and are presented in a practical and thought-provoking manner. (RR)

The nature and requirements of an industrial career are discussed in relationship to an academic career. The characteristics of an industrial physicist are given as adaptability, self-confidence and an ability to communicate. (TS)