Discusses certain pitfalls regarding the uncertainty relation between angular momentum and the angle variable from a pedagogic point of view. Further, an uncertainty relation has been derived for these variables in a simple and consistant manner. (Author/HM)

Presents a general treatment of scalar diffraction theory and discusses some concepts which yield new insight into the phenomena of diffraction throughout the whole space in which it occurs. (Author/HM)

Presents the answer to a question, which is intended for high school students, about the dispersion of white light by a glass prism. Why the high frequency waves travel slower than the lower frequencies in glass is also presented. (HM)

An approach to enzyme kinetics which emphasizes similarities between equilibrium binding and steady state kinetics is outlined. It is intended for use in teaching biochemistry to beginning students. (Author/SA)

Describes how physicists are zeroing in on a unified field theory. The contributions of particle physicists and a glossary for new particles are also presented. (HM)

Presented are several uses of the theory of accelerated frames. This approach, which does not require a knowledge of variational or energy methods, is intended for undergraduate students taking a first course in mechanics. (HM)

Describes how an elementary teacher can incorporate science into the classroom even if he/she feels unsure in the realm of science. Emphasis is on using processes of science. (SA)

Explores the use of free sort methodology to compare BSCS student and teacher understanding of the BSCS conceptual framework. Results support the idea that teachers who have better understanding of the BSCS conceptual framework, as shown by their sort patterns, may impart this understanding more effectively to students. (CS)

Describes three basic mechanisms of photosynthetic carbon dioxide assimilation in terrestrial higher plants. A few examples of each type are also included. (HM)

Suggests the use of a coordinate-free rotation operator for the teaching of rotations in Euclidean three space because of its twofold didactic advantage. Illustrates the potentialities of the coordinate-free rotation operator approach by a number of examples. (Author/GA)

Discusses some principles of biological taxonomy. The evolutionary principle in taxonomy and its limitations, and the difference in evolutionary patterns between plants and animals, are also discussed. (HM)

Various phenomena in chemistry and biology can be understood through Gibbs energy utilization. Some common phenomena in chemistry are explained including neutralization, hydrolysis, oxidation and reaction, simultaneous dissociation equilibrium of two weak acids, and common ion effect on solubility. (Author/SA)

An explanation of strong base effect demonstrates that deprotonation of a reactant shifts an equilibrium toward reactants in the same way that a deprotonation of a product shifts it towards products. (Author/SA)

Discusses several examples of the modern mathematics familiar to the pupils at the age where the mole concept is introduced, to help the teacher adopt an appropriate approach when dealing with this topic. (GA)