In Week 12 we shall extend our discussion of radiation to include harmonically varying sources of radiation.

There are two interactive sessions each week: in the Simon lecture theatre A (Monday) and Stopford lecture theatre 1 (Wednesday).

There are no mini-lectures in this last week of the course to give you time to review the course. Remember there is a course summary and some comments on the format and style of the exam. ..... Please let me know if you find any typos or other mistakes!

There are official 3rd year examples classes this week.

⚬ Monday 15:00-16:00 - Live Lecture - Harmonically varying sources of radiation (electric dipole)

N.B. This live lecture covers material that is not covered in any mini-lecture.

Lecture 23 Podcast ............. Notes written to visualiser

You can find here a link to the Jupyter notebook for the animation of the radiation pattern produced by an oscillating electric dipole that I have used in this lecture.

⚬ Wednesday 10:00-11:00 - Christmas-themed worked examples class (with chocolate ;-)

N.B. Please think about the puzzle I presented starting at 4 minutes into the podcast of the Wednesday lecture in week 11! There will be a special chocolate prize for people who have contributions to a discussion on this topic in today's session!

Podcast

Informal discussion of the total rate of energy radiation, rate with which photons are radiated, total energy radiated over the entire motion.

Past Exam Question for Christmas Interactive Session ............. Notes written to visualiser ............. Please try the entire problem before looking at the: complete solution

Revision of multipole expansions in electrostatics and magnetostatics.

In preparation for Monday's lecture on harmonically varying sources you may wish to revise the mini-lectures on multipole expansions

Mini-Lecture 5: Multipole Expansions in Electrostatics ............. Video ............. Lecture notes written to visualiser

Mini-Lecture 7c: Multipole Expansions in Magnetostatics ............. Video ............. Lecture notes written to visualiser

Harmonically varying sources.

D.J. Griffiths, Introduction to Electrodynamics: Chapter 11.1. (N.B. if in your edition of Griffiths, chapter 11 in entitled "Electrodynamics and Relativity" then try looking in chapter 10!)

M.A. Heald and J.B. Marion, Classical Electromagnetic Radiation (3rd edition): Chapter 9.1, 9.2, 9.8

J.D. Jackson, Classical Electrodynamics: Chapter 9.1-9.3.

Look at the