Download presentation

Presentation is loading. Please wait.

2
p.1067

3
Ch 34 Electromagnetic Waves 34.1 Displacement Current and the General Form of Ampere’s Law I d = 0 d E /dt B·ds = 0 (I + I d )

4
P34.1 (p.971)

5
Ch 34 Electromagnetic Waves 34.2 Maxwell’s Equations

6
Ch 34 Electromagnetic Waves 34.3 Plane Electromagnetic Waves

7
Properties of EM Waves 1. Transverse a. E and B propagation direction with E B at all times b. Propagation direction: E x B 2. Sinusoidal a. E y = E max cos(kx – t) b. B z = B max cos(kx – t) 3. E max /B max = E/B = c 4. c = (1/ 0 0 ) 1/2

8
P34.8 (p.971) P34.9 (p.971)

9
CT1: A planar electromagnetic wave is propagating through space. Its electric field vector is given by E = E max cos(kz – t) i. Its magnetic field vector is A. B = B max cos(kz – t) j B. B = B max cos(ky – t) k C. B = B max cos(ky – t) i D. B = B max cos(kz – t) k

10
Ch 34 Electromagnetic Waves 34.4 Energy Carried by Electromagnetic Waves A. Poynting’s Vector S = E x B / 0 Intensity = Power / Area = S Propagation direction is the direction of S B. Average Intensity I av = E max B max /2 0 P34.16 (p.972)

11
CT2: At a fixed point, P, the electric and magnetic field vectors in an electromagnetic wave oscillate at angular frequency . At what angular frequency does the Poynting vector oscillate at that point? A. 2 B. C. /2 D. 4

12
Ch 34 Electromagnetic Waves 34.5 Momentum and Radiation Pressure p = U/c (absorbed wave – normal incidence) p = 2U/c (reflected wave – normal incidence) Pressure = S/c (absorbed wave – normal incidence) Pressure = 2S/c (reflected wave – normal incidence) P34.33 (p.973)

13
Ch 34 Electromagnetic Waves 34.7 The Spectrum of Electromagnetic Waves Maxwell’s Rainbow: c = f

15
CT3: A long wavelength EM wave has a A. higher frequency than a short wavelength EM wave B. the same frequency as a short wavelength EM wave C. lower frequency than a short wavelength EM wave

16
Polling Question: Which material would you like to review most? A. Exam 1 B. Exam 2 C. New Material

17
Polling Question: Which chapters from the Exam 1 material would you like to review most? A. 13 B. 23 C. 24 D. 25

18
Polling Question: Which chapters from Exam 2 material would you like to review most? A. 26 B. 27 C. 28 D. 29 E. 30

19
Polling Question: Which chapters from the new material would you like to review most? A. 31 B. 32 C. 33 D. 34

20
Polling Question: Which type of material would you like to review most? A. problems B. concept questions C. general principles

Similar presentations

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google