1 / 37

Electromagnetic Waves and Maxwell's Equations

Lecture discussing electromagnetic waves, Poynting vector, Maxwell's equations, radiation pressure, and symmetry in Ampere's law. Exploring the relationship between electric and magnetic fields in wave propagation.

piccolo
Download Presentation

Electromagnetic Waves and Maxwell's Equations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electromagnetic WavesMaxwell`s Equations Lecture 23 Thursday: 8 April 2004

  2. ELECTROMAGNETIC WAVES • E = Emsin(kx - wt) • B = Bmsin(kx - w t)

  3. POYNTING VECTOR • This is a measure of power per area. Units are watts per meter2. • Direction is the direction in which the wave is moving.

  4. POYNTING VECTOR • However, since E and B are perpendicular,

  5. INTENSITY

  6. RADIATION PRESSURE

  7. RADIATION PRESSURE

  8. RADIATION PRESSURE

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

  10. MAXWELL’S EQUATIONS

  11. AMPERE’S LAW

  12. Reasons for the Extra Term • SYMMETRY • CONTINUITY

  13. SYMMETRY • A time varying magnetic field produces an electric field. • A time varying electric field produces a magnetic field.

  14. SYMMETRY

  15. CONTINUITY

  16. CONTINUITY

  17. CONTINUITY

  18. CONTINUITY

  19. AMPERE’S LAW

  20. AMPERE’S LAW

  21. ELECTROMAGNETIC WAVES

  22. ELECTROMAGNETIC WAVES

  23. MAXWELL’S EQUATIONS

More Related