The spatial variation in phase and the propagating wave-front of plane wave electromagnetic radiation are widely familiar text-book territory. In contrast, the developing amplitude and phase of radiation emitted by a dipole or multipole source generally receive less attention, despite the prevalence of these systems. There is additional complexity…

Multipolar solutions of Maxwell's equations are used in many practical applications and are essential for the understanding of light-matter interactions at the fundamental level. Unlike the set of plane wave solutions of electromagnetic fields, the multipolar solutions do not share a standard derivation or notation. As a result, expressions…

Among the most startling experiences a student encounters is learning that, unlike electrons and other elementary particles, photons have no mass. Under certain circumstances, however, the light quantum behaves as if it did have a finite mass. Starting from Maxwell's equations, we discuss how this arises when light interacts with a charged plasma,…

The analysis of paraxial Gaussian beams features in most undergraduate courses in laser physics, advanced optics and photonics. These beams provide a simple model of the field generated in the resonant cavities of lasers, thus constituting a basic element for understanding laser theory. Usually, uniformly polarized beams are considered in the…

We consider the nonlinear oscillations of a simple spring-magnet system that oscillates in the magnetic field of an inductive coil excited with a dc current. Using the relations for the interaction of a coil and a magnet we obtain the motion equation of the system. The relative strengths of the terms of this equation can be adjusted easily by…

We show how the concept of the magnetic dipole moment can be introduced in the same way as the concept of the electric dipole moment in introductory courses on electromagnetism. Considering a localized steady current distribution, we make a Taylor expansion directly in the Biot-Savart law to obtain, explicitly, the dominant contribution of the…

The primary source of federal aid to elementary and secondary education is the Elementary and Secondary Education Act (ESEA)--particularly its Title I-A program, which authorizes federal aid for the education of disadvantaged students. This report provides a brief overview of major provisions of the ESEA. It is organized by title and part of the…

This paper discusses the variety of ways in which The Bakken Museum has made use of replicas or simulations of historical instruments and experiments and demonstrations in education programs and exhibits for school children, families with children, and other museum audiences. Early efforts were stimulated in the mid-1980s by a collaboration with…

This paper describes a mini-project developed with 10th grade Portuguese students where, by using an experimental activity involving the use of natural dyes to colour wool, students acquired a better understanding of the concepts and relationship between the colour, the electromagnetic spectrum, and chemical bonding. As demonstrated by the results…

A general chemistry laboratory experiment using readily available chemicals is described to introduce college students to an exciting class of nanocomposite materials. In a one-step room temperature synthetic process, magnetite nanoparticles are embedded onto activated carbon matrix. The resultant nanocomposite has been shown to combine the…

This article explores how conceptions of choice and visions of the future are constructed within the context of specialized arts programs in two Canadian public high schools. The authors consider how discourses of the arts are implicated in the way that possible futures are envisioned differently, delimiting the range of choices available to…

We use a tablet to experimentally determine the dependencies of the magnetic field (B) on the electrical current and the axial distance from a coil (z). Our data shows good precision on the inverse cubic dependence of the magnetic field on the axial distance, B?z[superscript -3]. We obtain the value of air permeability µ[subscript air] with good…

School violence, an issue documented across the United States, has put a focus on school emergency preparedness for school principals. Therefore, the purpose of this study was to understand the school principal's level of emergency preparedness in New Jersey public schools and how the confidence and behavior of principals affect emergency…

A dual transfer program was created in 1983 in the St. Louis metropolitan area following a 1972 lawsuit brought upon the city, charging it with withholding an equal educational opportunity for Black students. Through this program, Black students from St. Louis City are provided with free transportation to one of 15 suburban school districts, and…

Through multilevel analyses of Educational Longitudinal Study and National Center for Education Statistics (NCES)-Barron's data sets, this study examined unequal chances for college enrollment for students from different high school types and locations. The study shows that students from more privileged high school sectors are able to maximize…