Article traces the development of the use of light-emitting fixtures for artistic expression. (GB)

Describes the use of the pinhole camera as an aid for teaching about physical optics and optical instruments. (CP)

Describes instructional techniques derived from the Piagetian tests for determining the stage of cognitive development of a child. Examines the principle of reflection and conservation of quantity. (AL)

Describes three elementary optics experiments using a laser instead of conventional light sources. Experiments illustrate the Fresnel-Arago law, elliptical polarization, double refraction and polarization in calcite, and interference by a Fresnel biprism. Because of the high intensity of the laser beam, these experiments lend themselves very well…

Using elementary principles of electron optics, the student gains greater understanding of the classical similarities between particles and waves. A method of solution is illustrated, and the results appear more reliable than those existing in prior literature. (Author/TS)

Speed and simplicity allow the refractometer to be used at many levels of instruction. The optical theory for its operation is reviewed, as are the various uses of the refractometer, including its usefulness in introducing and demonstrating optical theory and in determining optical properties of minerals. (PR)