Table of contents

Theoretical and experimental aspects of internal photoeffects in solids are discussed. The theory underlying the generation and recombination of carriers and their movement by diffusion and under the influence of applied electric and/or magnetic fields is indicated.

Photovoltaic, photoconductive and photoelectromagnetic effects are considered and the operation of p-n junctions as solar batteries or fast photodiodes is discussed. Some applications of solid state photoeffects - particularly for infra-red detectors - are outlined.

Storage of science equipment in schools presents organizational and space problems. The introduction of the Nuffield Course increased the volume and range of the equipment and aggravated the difficulties. Analysis of apparatus to be stored resulted in classification of items and design of specific storage facilities for each group. The range of facilities, such as plastic trays with associated smaller containers, apparatus and storage trolleys and chests of shallow drawers, is described. These facilities affect the design of school laboratories.

This article describes how physics can be applied to studying the structure of the earth and how the particular branch of the earth sciences, geochronology, can be used to date the age of the earth and subsequent geological events.

The development of the Van de Graaff accelerator over the past three decades is briefly reviewed with particular reference to the work of Van de Graaff and his colleagues, and an attempt is made to illustrate briefly how the special characteristics of this type of accelerator have contributed to advances in our knowledge of low energy nuclear physics. A brief mention is made of the application of Van de Graaff accelerators to other fields of physics, and to engineering, chemistry, medicine and the biological sciences.

The article is concerned with a survey of the status of D and H in electromagnetic theory and in particular to their usefulness in an A-level course. A brief discussion is given of the interaction of E and B with matter and it is shown how D and H are introduced. This discussion serves to illustrate that D and H are superfluous to an A-level course and that their introduction can only serve to confuse the student. It is also pointed out that their introduction in the recommended A.S.E. m.k.s. electricity course leads to incorrect definitions and a distortion of the aims of field theory.

An account is given of collapse under gravitational forces in Newtonian gravitation, and the modifications which relativity introduces are explained. The observational evidence about collapsing bodies is briefly surveyed and the difficulties of reconciling observation and theory are mentioned.

Modern developments in the ceramic industries have called for more highly trained personnel for management, and for research and development. This article describes a sandwich course for a Council for National Academic Awards (C.N.A.A.) degree in ceramic technology, embracing as well the disciplines of physics, chemistry and mathematics.

It has already been decided that we should have an Errors Page in Physics Education. The first contribution will be appearing shortly. ED.