Reviews developments in ultraviolet and light absorption spectrometry from December 1981 through November 1983, focusing on the chemistry involved in developing suitable reagents, absorbing systems, and methods of determination, and on physical aspects of the procedures. Includes lists of spectrophotometric methods for metals, non-metals, and…

This study analyzes the energy performance and cost of daylit schools designed by Innovative Design in Johnston County, North Carolina. The analysis compares the first-year energy performances of the Clayton and Selma Middle Schools and the K-5 Four Oaks School with similar but non-daylit schools in Johnston County. The study analyses the…

An audiotape presents study analysis of the effect of daylighting on student performance. The study includes a focus on skylighting as a way to isolate daylight as an illumination source, and separate illumination effects from other qualities associated with daylighting from windows. Results from test scores of over 21,000 student records, along…

This document discusses evidence regarding daylighting and student performance and development, and presents four case studies of schools that have cost effectively implemented daylighting into their buildings. Case studies reveal that design and construction strategies that incorporate daylighting do not significantly increase costs over…

Plants play an important role in the survival of every living thing; in fact, they are responsible for our very existence! In Photosynthesis, find out what makes plants so unique by studying the chemical process of photosynthesis - the amazing method of making food and oxygen from sunlight. Diagrams & microscopic photography illustrate the…

This textbook is a course in natural science and astronomy. The contents include mechanical properties of bodies; mechanics of solids; mechanics of fluids; nature and production of sound; nature and transmission of light; excitation and characteristic effects of electricity; properties and magnets; theoretical astronomy; and descriptive astronomy.

A laboratory experiment is detailed which students can themselves perform to illustrate the subtleties of Einstein's theory of relativity. (JP)

Several simple experiments using easily obtained materials are described which illustrate some of the properties of light (travels in straight lines, reflection, and refraction). (JR)

A brief review of how we know that nuclear reactions are the main source of stellar energy, how they synthesize the elements, and how they determine the course of stellar evolution. (Author/TS)

Describes a simple photometer capable of measuring small light intensities over small areas. The inexpensive, easy-to- construct instrument is intended for use in a student laboratory to measure the light intensities in a diffraction experiment from single or multiple slits. Typical experimental results are presented along with the theoretical…