Describes experiments using crude isolated chloroplast fractions which demonstrate some aspects of the photosynthetic light requiring process and a number of factors affecting them. These experiments are suitable for senior high school and college courses in biology. (JR)

Describes an experiment designed to expose the student to the classical techniques of organic dye synthesis and introduce him to a variety of modern scientific knowledge and exotic physical phenomena which he might not encounter otherwise. (Author/DF)

Describes common artificially produced organized media such as colloids, surfactants, and polymers and their usefulness in studying complex biochemical processes. Discusses selected recent photophysical and photochemical exploitations of these systems, including artificial photosynthesis, in situ generation of colloidal gold and platinum,…

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)

The application of very sensitive electronic detecting devices during the last decade has revolutionized and revitalized the study of polarization in celestial objects. The nature of polarization, how polaroids work, interstellar polarization, dichroic filters, polarization by scattering, and modern polarimetry are among the topics discussed. (JN)

Discusses the physics of liquid crystal displays (LCD) which is based on polarizing properties of crystals controlled by electric command. Production of alphanumerics, display control, and input are considered. (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 a study designed to compare the gradual development of children's understanding of shadows with Piaget's stages, categorize pupil responses in the shadow tasks, identify typical pupil responses in each category, and enumerate curriculum implications from the investigation. (GS)

Dramatic savings are possible by implementing minor modifications including: energy efficient light bulbs and tubes, ballasts, luminaires (fixtures), controls, operating practices, and revised maintenance. Many different changes can be made without affecting productivity, safety and security, visual comfort, aesthetic appeal, consumer discretion,…