(Lab12)_Pleochroism,_Interference_Colors,_Extinction_Angles_F10

(Lab12)_Pleochroism,_Interference_Colors,_Extinction_Angles_F10

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1 Optical Mineralogy Lab 12 - Fall, 2010 Pleochroism, Interference Colors, and Extinction Angles
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2 Pleochroism The ability of a mineral to show different colors when viewed along differing crystallographic orientations
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3 Pleochroism Video Double click to play movie Watch the grain in the very center
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4 Interference Colors Interference colors are the colors that you see when a rock thin section is placed between two pieces of polarizing film This phenomenon is a side effect of light slowing down as it passes through different substances You observe another effect of light slowing down when you see a straw in a glass of water appear to bend where it passes into the water
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5 Index of Refraction The slowing down of light as it passes through a substance is measured in a number called the index of refraction Interference colors are an effect produced by the fact that most solids have more than one index of refraction
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6 Retardation As the two beams of polarized light pass
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This note was uploaded on 12/13/2010 for the course GLY 4200c taught by Professor Warburton during the Spring '10 term at FAU.

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(Lab12)_Pleochroism,_Interference_Colors,_Extinction_Angles_F10

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