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Homework_9_Key_F10

# Homework_9_Key_F10 - 1° white and the fast directions of...

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GLY 4200 NAME HOMEWORK 9 Optical Indicatrix and Interference Colors Suppose a mineral has a retardation of 350 nm. What interference color would this produce? 1) orange - yellow (order & color) If this mineral is examined with a 1° red accessory plate and the fast directions of the plate and the mineral are parallel, what is the retardation? 2) 900 nm What color would this correspond to? 3) 2° orange - yellow If the fast directions are perpendicular, what will the retardation equal? 4) 200 nm What color would this correspond to? 5) 1° white Suppose a mineral has a retardation of 200 nm. What interference color would this produce? 6) If this mineral is examined with a quarter- 8 accessory plate
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Unformatted text preview: 1° white and the fast directions of the plate and the mineral are parallel, what is the retardation? 7) 350 nm What color would this correspond to? 8) 1° orange-yellow If the fast directions are perpendicular, what will the retardation equal? 9) 50 nm What color would this correspond to? 10) 1° black If a mineral has , = 1.533 and T = 1.577, what is the birefringence? 11) 0.044 Is the mineral isometric, uniaxial, or biaxial? 12) uniaxial What is the optical sign? 13) Negative How many axes does this indicatrix have? 14) Two What is the shape of the indicatrix (be specific)? 15) Oblate ellipsoid \WPDOCS\4200\HW2010\4200HW9_F10.wpd November 23, 2010...
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