Describes a simple apparatus and provides instructions to do relative index of refraction measurements/calculations and to show mathematical relationships betwen indices when light travels from one liquid to another. A listing of a computer program (in BASIC) which will analyze data is available from the author. (JM)

Suggestions are provided for making measurements with a Michelson interferometer (a useful tool for demonstrating the wave nature of light). By placing a lens between a television camera and interferometer, an appropriate image will be produced on a monitor. A representative photograph of TV monitor pattern is also provided. (JN)

Describes these tools for physics teaching: (1) stick with calibrations for measuring student reaction time; (2) compact high-pressure sodium lamps used to demonstrate spectra; (3) air pumps for fish tanks providing simple inexpensive motors; (4) a rotating manometer for measuring centripetal force; and (5) an apparatus for checking conservation…

Describes a new method and apparatus (consisting of a steel sheet, electromagnet, base, balls, and carbon paper) used to perform mechanics experiments which, until now, required use of an air table. Also compares the apparatus to an air table, explores its range of uses, and examines rotational dynamics. (DH)

Provides physics teachers with comments on the value and role of demonstrations during lecture sessions. (SK)

Describes: (1) the construction of a variable-volume resonator and Raleigh-disk resonance detector from simple materials; and (2) a learning aid for performing 60 experiments in basic electricity and electronics (consisting of a circuit board, components, and mask sheets). Illustrative experiments are included for both apparatus. (DH)

Explains: (1) use of piezoelectric film (connected to power supply and oscilloscope) to reveal force-versus-time curves of bouncing balls; (2) use of bound wood splints or meter sticks to illustrate tree or tower stability; and (3) apparatus of co-axial discs with connected linking rods and suspended bobs to simulate waves. (DH)

Describes a coriolis simulator which uses a carbon paper trace technique and a simple specific-heat apparatus, emphasizing instructional considerations. Also indicates that a variac and an ordinary electric drill can be used to wind coil if a lathe or coil winder are unavailable. (JN)

Lasers are useful for demonstrating ray optics, especially in large classrooms where a well-defined, easily-viewed ray is essential. Described is a simple device that converts any laser to a projection oscilloscope (or laser spirograph). Suggestions for using the device (including demonstrating Lissajous figures and conic sections) are provided.…