This module is concerned with the electromagnetic fields and electromagnetic radiation that pervade the world around you. It shows how the main ideas of electromagnetism can be encapsulated in the famous Maxwell’s equations. These can be used to explain the properties of light and radio waves; the magnetic fields produced by brain activity; the way a television tube works; the transparency of the cornea in your eye; and many other phenomena. If you're interested in the ways that physics and mathematics are used to understand the world around you, then this would be an appropriate module to study.
What you will study
The module will give you a detailed understanding of the theory of electromagnetism, which is one of the cornerstones of classical physics. It shows how the essential parts of this theory can be summarised in Maxwell's four equations and the Lorentz force equation. It uses these to develop an understanding of a wide range of physical phenomena, from the behaviour of light to the electrical and magnetic properties of materials, and of a broad range of applications, ranging from astrophysics, through materials science and technology, to medicine and biology. The module will provide you with many opportunities to develop your ability in using advanced physics concepts and mathematical techniques (such as vector calculus) to describe aspects of the physical world and to find quantitative answers to problems.
The study materials include three books, accompanied by DVD-ROMs containing computer-based activities and video material.
Book 1, An Introduction to Maxwell’s Equations brings together most of the key concepts of electromagnetism that are used in the module. Starting with basic ideas of electric charge and current, it develops an understanding of the important concepts of electric and magnetic fields, and shows how they are related by Maxwell’s four equations. The culmination of the book is the demonstration that Maxwell’s equations lead to the prediction of the existence of electromagnetic waves, and the identification of light as part of a spectrum of electromagnetic waves that stretch from short-wavelength gamma rays and X-rays through to longer-wavelength microwaves and radio waves. The book builds on the physics in The physical world (S207) and much of the mathematics will be familiar from Mathematical methods (MST224). However, one of the major roles of this book is to show how the language of mathematics, and vector calculus in particular, provides a concise and powerful framework for describing electromagnetic concepts and phenomena and the complex spatial arrangements that are implicit in them. You will also see how the physical phenomena can give meaning to mathematical ideas and techniques that you may have previously encountered in more abstract contexts.
Book 2, Electromagnetic Fields shows how electric and magnetic fields are modified in the presence of electrically conducting and insulating materials, or magnetic materials. It equips you with a range of tools and techniques for determining the fields and forces due to various arrangements of charge or current. Other chapters are concerned with practical issues like how currents are generated, and the forces that are experienced by charges and currents in the presence of electric and magnetic fields. The book concludes with a chapter on superconductivity and a discussion of the insights that the theory of special relativity gives to the relationship between electric and magnetic fields.
Book 3, Electromagnetic Waves explores solutions to Maxwell’s equations that correspond to electromagnetic waves, and uses a simple model to demonstrate how such waves can be generated by oscillating currents. By considering the propagation of electromagnetic waves in different materials and what happens to the waves at boundaries between materials, we are able to show that Maxwell’s equations can explain many familiar results of optics, such as the laws of reflection and refraction, and can explain why the sky is blue and why light from the sky is polarised. Other chapters explore electromagnetic waves in plasmas, the ionised gases found in the ionosphere, in stars and in interstellar space, and discuss how the interaction of light with the cornea of the eye accounts for its transparency, in contrast to the opaqueness of other biological tissues.
This module, when studied as part of an honours degree in the physical sciences or engineering, can help you gain membership of the Institute of Physics (IOP). For further information about the IOP, visit their website.
This module may also help you to gain membership of the Institute of Mathematics and its Applications (IMA). For further information, see the IMA website.
This is an OU level 3 module that builds on study skills and subject knowledge acquired from previous studies at OU levels 1 and 2. It is intended for students who have recent experience of higher education in a related subject at this level.
The module is designed to follow Mathematical methods (MST224) (or Mathematical methods, models and modelling (MST210)) and Physics: from classical to quantum (S217) (or The physical world (S207) now discontinued). You would find it very difficult to study SMT359 without the necessary mathematical background. The parts of MST224 or MST210 relating to partial differentiation, multiple integrals, vector calculus and complex numbers are especially important. S217 is the ideal physics module to prepare you for studying SMT359, especially Units 9-14.
It is essential that you establish whether or not your background and experience give you a sound basis on which to tackle the module, since students who are appropriately prepared have the best chance of completing their studies successfully. The Science Faculty has produced a booklet Are You Ready For SMT359? to help you to decide whether you already have the recommended background knowledge or experience to start the module or whether you need a little extra preparation. This can be viewed or printed as a PDF.
If you have any doubt about the suitability of the module, please speak to an adviser.
Since the module builds on the physics in Physics: from classical to quantum (S217) and in Mathematical methods (MST224), we recommend that you revise the relevant parts of these modules in the months before you start to study SMT359. This is particularly important if it is some time since you studied these modules, or if the Are You Ready For SMT359? booklet indicates that there are gaps in your knowledge or mathematical skills. The booklet gives advice on the relevant topics to revise.
Module books, other printed materials, DVD-ROMs, website.
You will need
Basic scientific calculator.
A computing device with a browser and broadband internet access is required for this module. Any modern browser will be suitable for most computer activities. Functionality may be limited on mobile devices.
Any additional software will be provided from a hardware device e.g. DVD drive or USB stick or is generally freely available. However, some activities may have more specific requirements. For this reason, you will need to be able to install and run additional software on a desktop or laptop computer with Windows 7 or higher.
The screen of the device must have a resolution of at least 1024 pixels horizontally and 768 pixels vertically.
To participate in our online discussion area you will need both a microphone and speakers/headphones.
Our Skills for OU study website has further information including computing skills for study, computer security, acquiring a computer and Microsoft software offers for students.