Two Kinds of Polarized Light

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Presentation transcript:

Two Kinds of Polarized Light Courtesy L.A. Nafie, Syracuse Univ.

Light beam characteristics - wavelength (frequency), intensity, polarization - determine types of transitions and information accessed. Absorbance: E-M wave maintain phase, attenuate intensity in sample hn My

Light Polarization, Birefringent retardation [courtesy Hinds Inc. brochure] RR = l/4 Rlin = 0 RL = -l/4 Right Circular Polarization Left Circular Polarization Linear Polarization Preserved in isotropic medium Black and Green waves are linear polarizations at right angle, sum to give linear polarization at 45o Phase retard orthogonal polarizations forward or back with birefringent medium If shift l/4 circular, if l/2 linear