02/03/2014PHY 712 Spring Lecture 81 PHY 712 Electrodynamics 10-10:50 AM MWF Olin 107 Plan for Lecture 8: Start reading Chapter 4 Multipole moment expansion of electrostatic potential – A.Spherical coordinates B.Cartesian coordinates
02/03/2014PHY 712 Spring Lecture 82
02/03/2014PHY 712 Spring Lecture 83 Poisson and Laplace equation in spherical polar coordinates
02/03/2014PHY 712 Spring Lecture 84 Poisson and Laplace equation in spherical polar coordinates -- continued
02/03/2014PHY 712 Spring Lecture 85 Properties of spherical harmonic functions
02/03/2014PHY 712 Spring Lecture 86 Legendre and Associated Legendre functions
02/03/2014PHY 712 Spring Lecture 87 Useful identity:
02/03/2014PHY 712 Spring Lecture 88 Some spherical harmonic functions:
02/03/2014PHY 712 Spring Lecture 89 Example:
02/03/2014PHY 712 Spring Lecture 810 Example:
02/03/2014PHY 712 Spring Lecture 811 Example -- continued:
02/03/2014PHY 712 Spring Lecture 812 Example -- continued:
02/03/2014PHY 712 Spring Lecture 813 Notion of multipole moment:
02/03/2014PHY 712 Spring Lecture 814 Significance of multipole moments
02/03/2014PHY 712 Spring Lecture 815 Relationship between spherical harmonic and Cartesian forms of multipole moments:
02/03/2014PHY 712 Spring Lecture 816 Consider previous example:
02/03/2014PHY 712 Spring Lecture 817 General form of electrostatic potential in terms of multipole moments:
02/03/2014PHY 712 Spring Lecture 818 Example of multipole expansion in evaluating energy of a very localized charge density (r) in a electrostatic field (r) (such as an nucleus in the field due to the electrons in an atom).
02/03/2014PHY 712 Spring Lecture 819 Simple examples of multipole distributions x y z x y z
02/03/2014PHY 712 Spring Lecture 820 Another example of multipole distribution
02/03/2014PHY 712 Spring Lecture 821 Another example of multipole distribution -- continued
02/03/2014PHY 712 Spring Lecture 822 Another example of multipole distribution -- continued
02/03/2014PHY 712 Spring Lecture 823 Another example of multipole distribution -- continued