Particle size determination: An undergraduate lab in Mie scattering
A technique for determining the size of microscopic spherical particles using light scattering is presented as an undergraduate physics lab. Scatterer size is determined from angular scattering distri...
A technique for determining the size of microscopic spherical particles using light scattering is presented as an undergraduate physics lab. Scatterer size is determined from angular scattering distri...
Choosing and rechoosing to have or have not interference
Loss and restoration of interference similar to that produced in "quantum erasure" can be demonstrated in interference of macroscopic laser beams by using polarization to distinguish light f...
Loss and restoration of interference similar to that produced in "quantum erasure" can be demonstrated in interference of macroscopic laser beams by using polarization to distinguish light f...
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Waves in locally periodic media
American Journal of Physics -- February 2001 -- Volume 69, Issue 2, pp. 137-154
Issue Date: February 2001
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We review the theory of wave propagation in one dimension through a medium consisting of N identical "cells." Surprisingly, exact closed-form results can be obtained for arbitrary N. Examples include the vibration of weighted strings, the acoustics of corrugated tubes, the optics of photonic crystals, and, of course, electron wave functions in the quantum theory of solids. As N increases, the band structure characteristic of waves in infinite periodic media emerges. ©2001 American Association of Physics Teachers.
| History: | Received 18 January 2000; accepted 7 June 2000 |
| Permalink: | http://dx.doi.org/10.1119/1.1308266 |