1 / 30

Polarisability and Scattering in Interstellar Medium

This article discusses the concept of polarisability and its relation to scattering in interstellar gas and dust clouds.

doriej
Download Presentation

Polarisability and Scattering in Interstellar Medium

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. Harry Kroto 2004

  2. P = E

  3. P = E E = Eocos2πωt

  4. P = E E = Eocos2πωt P = Eocos2πωt

  5. Harry Kroto 2004

  6. this shows a Hertz osci http://en.wikipedia.org/wiki/File:Dipole.gif-oli Harry Kroto 2004

  7. http://www.ccpo.odu.edu/~lizsmith/SEES/ozone/class/Chap_4/index.htmhttp://www.ccpo.odu.edu/~lizsmith/SEES/ozone/class/Chap_4/index.htm

  8. P = α E Total polarisability

  9. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate

  10. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe

  11. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq

  12. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq P = [αo + (∂α/∂q) q] E

  13. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq P = [αo + (∂α/∂q) q] E P = [αo + (∂α/∂q) q] Eocos 2πωet

  14. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq P = [αo + (∂α/∂q) q] E P = [αo + (∂α/∂q) q] Eocos 2πωet P = [αo + (∂α/∂q) qo cos 2πωqt] Eocos 2πωet

  15. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq P = [αo + (∂α/∂q) q] E P = [αo + (∂α/∂q) q] Eocos 2πωet P = [αo + (∂α/∂q) qo cos 2πωqt] Eocos 2πωet P = αo Eocos 2πωet + (∂α/∂q) qo Eocos 2πωqt cos 2πωet

  16. P = α E Total polarisability α = αo + (∂α/∂q)q Molecular polarisability - function of coordinate E = Eocos 2πωet Electric Field radiation frequency ωe q = qo cos 2πωqt coordinate of the molecular motion ωq P = [αo + (∂α/∂q) q] E P = [αo + (∂α/∂q) q] Eocos 2πωet P = [αo + (∂α/∂q) qo cos 2πωqt] Eocos 2πωet P = αo Eocos 2πωet + (∂α/∂q) qo Eocos 2πωqt cos 2πωet P = αo Eocos 2πωet + ½(∂α/∂q) qo Eo[cos 2π(ωe+ ωq)t + cos 2π(ωe- ωq)t]

  17. P = E E = Eocos2πωt P = Eocos2πωt

  18. P = E E = Eocos2πωt P = Eocos2πωt

  19. P = E E = Eocosωt P = Eocosωt

  20. Attenuation due to scattering by interstellar gas and dust clouds Harry Kroto 2004

  21. Harry Kroto 2004

  22. Harry Kroto 2004

  23. P =  E

  24. P =  E

  25. P =  E

  26. P =  E

  27. Bill Madden 559 2123

More Related