Presents an experiment designed to give students some experience with photochemistry, electrochemistry, and basic theories about semiconductors. Uses a liquid-junction solar cell and illustrates some fundamental physical and chemical principles related to light and electricity interconversion as well as the properties of semiconductors. (JRH)

Describes a simple inexpensive circuit which can be used to quickly demonstrate the basic function and versatility of the solid state diode. Can be used to demonstrate the light-emitting diode (LED) as a light emitter, temperature sensor, light detector with both a linear and logarithmic response, and charge storage device. (JRH)

Presents a hands-on science activity in which students can explore interesting science concepts related to soap, light, and color. Includes materials, directions, and related questions. (SOE)

Describes optics demonstrations that use a mirror mounted on a laser pointer. Can be used to demonstrate reflection from plane or curved surfaces, refraction, and Snell's law. (Author/JRH)

Describes how using skylights and other daylighting methods can improve the efficiency of a school facility, enhancing the learning environment and simplifying maintenance. (EV)

Describes the use of a laser pointer to measure the speed of light by incorporating the phase delay between a modulated split beam of light. (JRH)

Describes the construction and purpose of stress patterns that are easily observed in the rear windows of most cars. Presents an explanation for why we are able to see these stress patterns. (ZWH)

The differences between measuring light intensity for the human eye and for plant photosynthesis are discussed. Conversion factors needed to convert various units of light are provided. Photosynthetic efficiency and the electricity costs for plants to undergo photosynthesis using interior lighting are described. (KR)

Activities that use a common fluorescent light as a strobe light to make things appear to slow down, speed up, or stand still are presented. Background information on strobe lights and directions for the activities are provided. (KR)

The relationship between theories about electrical conductivity in microscopic wires and laser speckle patterns is described. Practical applications of laser speckle patterns are included. Wave ideas are being used to describe and predict novel phenomena in disordered solids. (KR)

This review of the literature examines the effects of blue light (or near UV - ultraviolet), especially that given off by black-light tubes, often used with children with visual impairments. It finds a long-term danger of retinal and lens damage and offers six practical suggestions which emphasize using proper filters and limiting exposure to…

This study compared effects of four visual conditions of stimuli and light on the visual performance of 30 children with low vision (divided into high, and low, visual-acuity groups). Orange stimuli viewed under black light resulted in the best overall performance, benefitted the low-acuity group more than the high-acuity group, and was the…

Describes the use of carbide lights as an excellent mechanism for introducing or reviewing many basic chemistry concepts including elements and compounds, endothermic and exothermic reactions, physical and chemical changes, and balancing chemical equations. (JRH)

Indicates the difficulties of teaching concepts beyond light and color and creating memorable learning experiences. Recommends sequential activities using the mystery box approach to explain how scientists and doctors use photon applications. (YDS)

Examines the simultaneous occurrence of ultraviolet light and the photoelectric effect. (CCM)