Provides a demonstration using an overhead projector and colloidal mixture to produce a red sunset. Uses an opal to make blue, clear, and red sky effects. (MVL)

Provides a method for making brighter ray-tracing techniques for optics demonstrations. Uses common optical equipment and no longer needs the commercial ray box. (MVL)

Compares and contrasts a four-year university in China with a two-year community college in the United States (Columbus, Ohio). (MVL)

Stresses that an important industrial area is product reliability, especially for semiconductors. Suggests that physics students would benefit from training in semiconductors: the many modes of failure, radiation effects, and electrical contact problems. (MVL)

Discusses the properties and application of three light-to-voltage optical sensors. The sensors have been used for sensing diffraction patterns, the inverse-square law, and as a fringe counter with an interferometer. (MVL)

Presents two questions for classroom discussion: (1) What color is the sun looking through the Martian atmosphere? and (2) Is there any justification for planting by the phases of the moon? (MVL)

Describes the Student Science Training Program (SSTP) held in Hawaii for 30 high school students gifted in science and math. The seven-week program presents coursework, laboratory experiments, recitation/discussion, computer programming, field trips, research participation, and socialization. (MVL)

Describes the quartz tuning fork, frequency divider, liquid crystals, and light polarization of a digital-readout watch. (MVL)

Provides an inexpensive method (less than $125) for performing experiments usually requiring a laser. Suggests building a laser diode light source, a device for producing multiple parallel beams, a light meter, a polar/analyzer, a laser light show apparatus, and a circuit to modulate the laser diode intensity. (MVL)

Proposes an alternative approach to locating the image formed by a lens. Two special rays are used to locate the image, then a number of other rays are drawn in to indicate that light from the object passes through every part of the lens. (MVL)

Provides six short story problems that are solved using common physics concepts. Includes solutions. (MVL)