purcell_simplified - Purcell Simplied Magnetism Radiation...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Purcell Simplifed: Magnetism, Radiation, and Relativity Anaheim, CA, 14 January 1999 Dan Schroeder, Weber State University, http://physics.weber.edu/schroeder Introductory Comments There’s almost nothing original in this talk; Purcell gets all the credit. Don’t use Purcell’s book in an introductory course. (If you’re tempted, read the reviews in Amazon.com.) I’m not presenting a complete curriculum; this material would occupy only 3–5 class sessions. I have prepared a 39-page set of typeset class notes, suitable for a calculus-based introductory course, which you can download from my web site. This material could also be adapted to an algebra-based course, with some loss of rigor. Prerequisites: 1. An understanding of electrostatic Felds, including either Gauss’s law or equivalent rules for Feld lines. 2. ±amiliarity with basic magnetic phenomena, e.g., parallel currents attract. 3. The basics of special relativity, including reference frames, length contraction, and the cosmic speed limit but not including the Lorentz transformation equations or relativistic dynamics. Magnetism as a Consequence oF Length Contraction Model a current-carrying wire as a line of negative charges ( - q ) at rest and a line of positive charges (+ q ) moving to the right at speed v . The average linear separation between charges is ± . Consider a “test charge” Q moving
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/29/2011 for the course PHYSICS 606 taught by Professor Bedaque during the Spring '11 term at Maryland.

Page1 / 2

purcell_simplified - Purcell Simplied Magnetism Radiation...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online