Explains the necessity for a domain concept in understanding ferromagnetism and discusses various factors influencing the domain configuration in a crystal. (MLH)

Discusses the role of phonon quasi-particles in a wide range of phenomena from simple thermal properties to super conductivity and other electric and magnetic phase transitions. (MLH)

Provides directions for constructing graphical alignment charts to solve a variety of mathematical physics problems. (MLH)

Outlines a selection of demonstrations for teaching color science to students of science, fine arts, and interior design. (MLH)

Outlines a mathematical paradox obtained when calculating the dimensions of a hydorgen molecule using relativistic wave mechanics. (MLH)

Using the simple optical system and photodiode described in this article it is possible to give clear, quantitative demonstrations of all the Fraunhofer diffraction phenomena at single and multiple apertures. These measurements can be related to the theoretical predictions given in standard textbooks. Circuit diagram and optical layout are…

Traditional undergraduate courses in gas kinetic theory encourage the view that in all collisions between a gas atom and a surface, the angle of incidence of the gas atom equals its angle of reflection. This article illustrates and explains the incorrectness in assuming specular reflection and zero dwell time. (Author/MA)

Illustrated and described is the design of an apparatus that can be used by students in a short period of time. It gives quantitative results showing evidence of thermoelastic properties of fluids near the critical point. (Author/MA)

Describes a method in which metals can be identified by the direction of the e.m.f. generated when the junctions in a circuit containing two dissimiliar metals are at different temperatures. (MLH)

Describes an experimental technique for determining liquid dielectric constants by measuring the rise of the liquid in a paralled-plate capacitor at a known voltage. (MLH)

Describes the adaption of a simple homogeneous analogue computer for the solution of the Schrodinger wave equations. Photographs of results are included. (CP)

Describes the electronic circuits used in computer technology for the processes of addition, subtraction, multiplication, and division. (MLH)

Discusses ten methods for measuring the thermal expansion of solids and the way in which the expansion coefficient relates to other properties of matter. (MLH)

Discusses three theories used to explain the interaction of electromagnetic radiation with matter: the multiphoton theory, the cascade theory, and the effective photon theory. (MLH)