Download presentation

Presentation is loading. Please wait.

Published byBenny Rick Modified about 1 year ago

1
Electromagnetic Waves Maxwell`s Equations Lecture 23 Thursday: 8 April 2004

2

3

4

5

6

7

8
ELECTROMAGNETIC WAVES E = E m sin(kx - t) B = B m sin(kx - t)

9

10

11
POYNTING VECTOR This is a measure of power per area. Units are watts per meter 2. Direction is the direction in which the wave is moving.

12
POYNTING VECTOR However, since E and B are perpendicular,

13
INTENSITY

14

15
RADIATION PRESSURE

16

17

18

19
Comet: Picture taken WEDNESDAY 26 March 1997,at 2000 CST,at White Bear Lake,Minnesota.

20
MAXWELL’S EQUATIONS

21

22

23

24
AMPERE’S LAW

25
Reasons for the Extra Term u SYMMETRY u CONTINUITY

26
SYMMETRY u A time varying magnetic field produces an electric field. u A time varying electric field produces a magnetic field.

27
SYMMETRY

28
CONTINUITY

29

30

31

32
AMPERE’S LAW

33

34
ELECTROMAGNETIC WAVES

35

36
MAXWELL’S EQUATIONS

37

Similar presentations

© 2016 SlidePlayer.com Inc.

All rights reserved.

Ads by Google