1. PHY 712 Electrodynamics 9-9:50 AM MWF Olin 103 Plan for Lecture 36: Review Part II:  Further comment of Kramers-Kronig transform  Some equations for top of your head  Example problems  Course evaluation forms PHY 712 Spring 2015 -- Lecture 36104/24/2015

2. PHY 712 Spring 2015 -- Lecture 36204/24/2015

3. PHY 712 Spring 2015 -- Lecture 36304/24/2015

4. Review topic – analytic properties of dielectric function Material from Chapter 7 in Jackson Kramers-Kronig transform – for dielectric function: The displacement field D is related to the electric field E PHY 712 Spring 2015 -- Lecture 36404/24/2015

5. Practical evaluation of Kramers-Kronig relation PHY 712 Spring 2015 -- Lecture 36504/24/2015

6. Practical evaluation of Kramers-Kronig relation PHY 712 Spring 2015 -- Lecture 36604/24/2015

7. Evaluation of singular integral numerically: PHY 712 Spring 2015 -- Lecture 36704/24/2015

8. PHY 712 Spring 2015 -- Lecture 368 Evaluation of Kramer’s Kronig transform using Mathematica (with help from Professor Cook)

9. 04/24/2015PHY 712 Spring 2015 -- Lecture 369 Another example

10. 04/24/2015PHY 712 Spring 2015 -- Lecture 3610 Some equations worth remembering --

11. 04/24/2015PHY 712 Spring 2015 -- Lecture 3611

12. 04/24/2015PHY 712 Spring 2015 -- Lecture 3612

13. 04/24/2015PHY 712 Spring 2015 -- Lecture 3613

14. 04/24/2015PHY 712 Spring 2015 -- Lecture 3614 Energy and power (SI units)

15. 04/24/2015PHY 712 Spring 2015 -- Lecture 3615

16. 04/24/2015PHY 712 Spring 2015 -- Lecture 3616

17. 04/24/2015PHY 712 Spring 2015 -- Lecture 3617

18. 04/24/2015PHY 712 Spring 2015 -- Lecture 3618 In your “bag” of tricks:  Direct (analytic or numerical) solution of differential equations  Solution by expanding in appropriate orthogonal functions  Green’s function techniques

19. 04/24/2015PHY 712 Spring 2015 -- Lecture 3619 How to choose most effective solution method --  In general, Green’s functions methods work well when source is contained in a finite region of space

20. 04/24/2015PHY 712 Spring 2015 -- Lecture 3620

21. 04/24/2015PHY 712 Spring 2015 -- Lecture 3621 Electromagnetic waves from time harmonic sources

22. 04/24/2015PHY 712 Spring 2015 -- Lecture 3622 Electromagnetic waves from time harmonic sources – continued:

23. 04/24/2015PHY 712 Spring 2015 -- Lecture 3623 Electromagnetic waves from time harmonic sources – continued:

24. 04/24/2015PHY 712 Spring 2015 -- Lecture 3624 Radiation from a moving charged particle x y z Rq(t)Rq(t) r r-R q (t r )=R q  v.

25. 04/24/2015PHY 712 Spring 2015 -- Lecture 3625 Liènard-Wiechert potentials –(Gaussian units)

26. 04/24/2015PHY 712 Spring 2015 -- Lecture 3626 Example: Problem 15.2 in Jackson: A nonrelativistic particle of charge e and mass m collides with a fixed, smooth, hard sphere of radius R. Assuming that the collision is elastic, show that in the dipole approximation (neglecting retardation effects) the classical differential cross section for the emission of photons per unit solid angle per unit energy interval is: where  is measured relative to the incident direction.

27. 04/24/2015PHY 712 Spring 2015 -- Lecture 3627  v v’ r

28. 04/24/2015PHY 712 Spring 2015 -- Lecture 3628 Low frequency radiation from charged particle during a collision as analyzed by Eq. 15.2 :