Describes an apparatus designed to investigate molecular motion by means of light scattering. Light from a He-Ne laser is focused into a cell containing a suspension of polystyrene spheres. The scattered light, collected on the photosurface of a photomultiplier tube, is analyzed. The apparatus won first prize in Demonstration Lecture Apparatus in…

Points out textbook errors or discrepancies which are confusing or unclear in describing the photon. Cites specific texts and the particular point of confusion in each one. (JM)

Briefly reviews some optical and other physical properties of minerals that can be determined in reflected/incident light. Topics include optical properties of minerals, reflectance, internal reflections, color, bireflectance and reflection pleochroism, anisotropism, zonation, and reflected light microscopy as a teaching tool in undergraduate…

Presents a general overview of various light-related findings with implications for the computer assisted learning environment. Suggests that software developed for instructional purposes incorporate color to maximize visual sensitivity and retention of information while minimizing visual fatigue. (Author/JN)

Provides instructions for producing a spectrum in the secondary science classroom. Offers suggestions for using the spectrum and discusses how to make a rainbow using a garden hose or houseplant sprayer. (JN)

Describes a method to stimulate the dispersive properties of various media. It is also used to illustrate the characteristics of electromagnetic precursion. (Author/GA)

An effective approach to drawing instruction at the secondary level is through the exploration of unique materials and techniques. Two such approaches involve the use of physics and aesthetics--creations of drawings utilizing photographic processes. Methods of teaching direct light drawing and etched light drawing are presented. (Author/KC)

Presents two experimental set-ups. The first demonstrates the law of Malus using a pair of Polaroid polarizers and a monochromatic light source with an interference filter. The second describes a modification of Hilton's apparatus to demonstrate the effects of the magnetic hysteresis on an overhead projector. (CS)

Describes experiments intended to produce a better understanding of the holographic method of producing images and optical imaging by other optical systems. Application of holography to teaching physics courses is considered. (Author/SA)

An AIA Honor Award was presented for an athletic facility at St. Mary's College. All elements are exposed and painted bright colors to differentiate functions. Walls are transparent panels to admit as much light as possible. (Author/MLF)