2009 Advanced Laboratories Conference Abstract Detail Page

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Abstract Title: Study of electric and magnetic dipole radiation via scattering from nanoparticles
Abstract: Senior and graduate level students are hardly ever exposed to an experiment on multipole radiation even though it is taught in lecture courses on electrodynamics and nuclear physics. The author has developed a simple laboratory experiment to study angular distribution and polarization of electric and magnetic dipole radiation. This experiment arose out of a recent study [Phys. Rev. Lett. 98, 217402 (2007); Am. J. Phys. 71, 1294 (2003)] on the contribution of higher multipoles to optical scattering in aqueous suspensions of 50-200 nm polystyrene spheres and colloids. This study resulted in the first observation of the breakdown of electric dipole approximation in the visible region. The students learn about particle size and wavelength dependence of scattering and how the atomic-molecular scattering is modified by the presence of nanoscatterers. After performing this lab thy can explain why one does not see a (polarized) laser beam in a dark room when looking along its electric field. It is easily implementable low cost experiment rich in physics.
Abstract Type: Poster
Contributed Poster: Download the Contributed Poster
Session: Session IX - Effective Experiments Poster Session

Author/Organizer Information

Primary Contact: Natthi L. Sharma
Eastern Michigan University
303 Strong Hall
Ypsilanti, MI 48197
Phone: 734-487-8645
Fax: 734-487-0989
Co-Author(s)
and Co-Presenter(s)
Ernest Behringer,  Eastern Michigan University, ebehrige -at- emich.edu