1. Text/References 교재: 전자기학, 7판, 김강욱, 김남, ...(Ulaby원저)

2. On the Web Caltech Physics Applets(
Hyperphysics at Georgia Tech (
Physics 2000 (UC Boulder)

3. Do not forget Wikipedia How Stuff Works (http://www.wikipedia.org)
Caltech Physics Applets (
Hyperphysics at Georgia Tech (
Wikipedia (
How Stuff Works (

4. Ch1-Overview

5. Maths Calculus Trig Geometry Integration by change of variables
Derivatives, Chain Rule
Simple PDEs
Trig
sin2q, sin(A+B), cosA + cosB, sin2q + cos2q
Geometry
Area?
Perimeter?
Area?
Volume?
Area?
Volume?

6. Six things to do before exams
Read day-to-day summaries for qualitative
overview
2. Listen to lecture slide recordings
3. List important equations to remember
4. List important math formulae (calculus, trig)
5. Go over Mock Exam and solutions
6. Go over HWs and solutions
Make sure you can do these (& similar!)
problems ON YOUR OWN !!
DO NOT LEAVE FOR THE LAST MOMENT!!

7. formula (포'뮬러)
formulas, formulae (포'뮬리)
stimulus
stimuli (스티'뮬라이)

8. Six keys to success Be regular 2. Try to understand, not memorize
3. Challenge yourself with the concepts
4. Brush up on maths (this is often the killer!)
5. Avoid careless mistakes at exam (CHECK!)
6. Revise

9. Why Electromagnetism? Optics Rainbows Polaroids Lightning Northern
Lights
Telescope
Laser
Optics

10. Why Electromagnetism?
Electronic Gadgets

11. Why Electromagnetism? Chemistry and Biology Chemical Reactions
Neural Impulses
Ion Channels
Biological Processes
Chemistry and Biology

12. Topics to Discuss History of Electromagnetics Overview of the class
New trends

13. How do EM Fields Propagate?
Transmission line equations
Characteristic impedance of a line
How much is reflected at a load?
How would one eliminate this reflection?
What about transient pulses?
Transmission Line
LOAD

14. How do static charges interact? (Electrostatics)F2 F1 r
Coulomb’s Law
Force  q1q2/r2 q2 q1
Gauss’s Law
Flux  q1 + q2 + .. +
Interaction in materials (Polarization)

15. Vector Fields (A “disturbance in the force”)q
E = lim F/q
q  0

16. Vector Fields (A disturbance in the force)
Non-negligible q

17. How do magnetic fields interact? (Magnetostatics)
Biot-Savart’s Law
Current  magnetic field
H ~ I/r
dl1 I1 I2
dl2 R
i12
i21
Another current senses it
Force ~ i2 x H

18. Time variation couples E and H
Ampere’s Law
Varying E produces H
Faraday’s Law
Varying H produces E

19. Electrodynamics Maxwell’s Eqns. E H
Varying E produces H produces E produces H .. E H
Coulomb/Gauss’ Law
Gauss’ law for magnets
Ampere’s Law
Faraday’s Law
Maxwell’s Eqns.

20. Electrodynamics Don’t worry about memorizing these yet –
We will come back to these later. But
meanwhile, let’s try to understand them
qualitatively....
Coulomb/Gauss’ Law
Gauss’ law for magnets
Ampere’s Law
Faraday’s Law

21. Deciphering Maxwell’s equations
Electric fields diverge
but don’t curl
Magnetic fields curl
but don’t diverge

22. Deciphering Maxwell’s equations
Electric fields diverge
but don’t curl
(they start and end on
charges or ‘poles’)
Magnetic fields curl
but don’t diverge
(they loop on themselves
since there are no
magnetic poles)

23. We thus have Maxwell’s equations in their simplest form (for static sources, in vacuum)
Div(E)  Q
Curl(E) = 0
Curl(H)  I
Div(H) = 0
We will define Div and Curl precisely later on.
For now, think of them as the number of diverging
and curling lines respectively

24. We thus have Maxwell’s equations in their simplest form (for static sources, in vacuum)
Div(E)  Q
Curl(E) = 0
Curl(H)  I
Div(H) = 0
Note how E and H equations are independent of
each other !! This is true for static sources
For dynamic sources (time-dependent currents),
you also get dH/dt terms for the E equations and
dE/dt terms for the H equations, which couple them.
Varying E produces H produces E produces H .. E H

25. Consequences of Maxwell’s equations
Waves
Radiation

26. Wave optics l > d
Interference
Diffraction
Polarization

27. Geometrical Optics l << d
Mirrors
Lenses

28. For the aspiring scientists/ engineers
What lies beyond Maxwell (1873)?
Will this be in your exams? NO

29. Nanoparticle optics Visible light = 380-620nm

30. “Anomalous Optics” Negative refraction: 정상적인 물질의 경우와 반대방향을 굴절
Laws are reversed !
Applications: Reverse Doppler, perfect lens

31. Quantum optics: Photonic Bandgap Materials = periodic structure (period = half wavelength): total reflection at resonance, total transmission off ressonance

32. Cellphone interactions with head

33. Coherent optics – Lasers coherence = same frequency and constant phase difference; produces stationary interference
Atomic Laser

34. Maxwell’s equations hold for all systems, from large objects to nanoscale…
Solar Discharge
(~1.4 x 109 m dia)
Molecular fields
(~10-8 m dia)

35. …. From ultrafast to ultraslow
Optical Molasses/Condensates
Slow light down from 1.02 billion km/hr
to 1.6 km/hr !!
(Lene Hau, Harvard physicist)
Cerenkov Radiation
(when a particle outruns its field)
Optical equivalent of a sonic boom

36. Even in Sci-Fi !