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Here, there, and everywhere: Routing light through an optical system Chem 420 September 10, 2008
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Recap from Monday z Analog and digital signals—A/D conversion z Experimental techniques guided by information sought. Will determine light sources, optical materials, detectors, geometries, etc. z Different sources used to probe at different energies (frequencies, wavelengths) z Continuum sources and line sources z Black body sources (filaments), lamps, plasmas, LEDs z Can have spectral structure z Laser— L ight A mplification by S timulated E mission of R adiation z Pumping, population inversion, stimulated emission z 3- versus 4-state lasers (lasing transition different than pumping λ ) z Continuous wave and pulsed
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Properties of electromagnetic radiation z Interference z Transmission z Refraction z Reflection z Diffraction z Scattering z Polarization
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Interference - In Phase -7 -6 -5 -4 -3 -2 -1 0 1 2 02468 1 0 1 2 Time Amplitude () sin 2 yA t π νφ =+
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Interference -- Quarter Wave Shift -7 -6 -5 -4 -3 -2 -1 0 1 2 02468 1 0 1 2 Time Amplitude () sin 2 yA t π νφ =+
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Interference -- Half Wave Shift -7 -6 -5 -4 -3 -2 -1 0 1 2 02468 1 0 1 2 Time Amplitude () sin 2 yA t π νφ =+
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Transmission through materials z Compared to vacuum, the velocity of light is reduced when propagating through materials that have polarizable electrons.
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This note was uploaded on 04/08/2010 for the course CHEM 420 taught by Professor Bailey during the Spring '08 term at University of Illinois at Urbana–Champaign.

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RelativeResourceManager(5) - Here, there, and everywhere:...

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