o Course homepage, Ongoing Lectures, TT-system 

• Instructor’s weekly informal sessions:

Tu 3:30-4:20, RAS 213 ; Fri 4-5, RLM 5.104

• Midterm 3: Thursday (4/3), 7-8:45pm, WCH 1.120. Please be at the exam site by 6:50pm.

Lec. 31 EM Waves

• Displacement current: Maxwell-Ampere law.
• Plane em waves

o Generating a plane em waves

o General properties of em waves

• Traveling waves with a given frequency

o Fixed-t, fixed-x and fixed phase angle pictures.

o EM spectrum as a function of the wavelength.

• Equal partition of energy
• Intensity of the em waves.

Reminders:

• Be familiar with the part of the course summary of this midterm.
• This midterm covers HW8, 9 and 10, and qualitative knowledge on EM waves. Text book: Mainly chapters 30-32 and the knowledge of other chapters, especially chapter 29, which are needed to do hw8.
• Review materials:

o HW8, 9, 10.

o Those PQ problems comparable to the hw-problems.

o Our TA Fung has posted a list of additional practice problems from the back of the chapters.

o Consult lecture notes and textbook for more discussions.