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 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 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)