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GLY 3202C - Exam 2 (Module 4-6) Practice Questions and Answers 100% Pass $12.49   Add to cart
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GLY 3202C - Exam 2 (Module 4-6) Practice Questions and Answers 100% Pass
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GLY 3202C - Exam 2 (Module 4-6) Practice Questions and Answers 100% Pass True or false? Rocks must be sliced into thin sections in order to be viewed under the petrographic microscope. - ANSWER-True What is refraction? - ANSWER-When light bends as it crosses a boundary between two mediums. W...

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  • November 13, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
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GLY 3202C - Exam 2 (Module 4-6)
Practice Questions and Answers 100%
Pass

True or false? Rocks must be sliced into thin sections in order to be viewed under the

petrographic microscope. - ANSWER✔✔-True


What is refraction? - ANSWER✔✔-When light bends as it crosses a boundary between

two mediums.


Which mineral has the lowest relief relative to epoxy resin (n=1.537)? (n is approximate)

- ANSWER✔✔-Quartz: n=1.5


Which property of a light wave determines its color? - ANSWER✔✔-Wavelength


What is defined as the difference between the maximum and minimum refractive

indices for a crystal? - ANSWER✔✔-Birefringence


How does light vibrate when it has traveled from the light source and through the

lower polarizer? - ANSWER✔✔-Light vibrates in a single plane.


Is amorphous material such as basaltic glass isotropic of anisotropic? - ANSWER✔✔-

Isotropic

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Page 1/14

, A mineral is black under plane polarized light and stays black on rotation under cross-

polarized light. How would you classify it? - ANSWER✔✔-Opaque


What property is defined as a crystal changing color on rotation under plane polarized

light? - ANSWER✔✔-Pleochroism


Which lighting condition(s) would you use to observe extinction? - ANSWER✔✔-Cross-

polarized light


Which crystal system(s) will look extinct when observed directly down the c-axis?

[Select all that apply.] - ANSWER✔✔-Hexagonal


Tetragonal


What does the 2V angle measure? - ANSWER✔✔-The angle between two optic axes.


When the accessory plate is inserted, what happens to the upper right (NE) quadrant,

just inside the isogyre, of a uniaxial or biaxial interference figure for a mineral with a

negative optic sign? - ANSWER✔✔-It turns yellow


You observe a crystal with strong pleochroism in PPL. Which mineral(s) could it be?

[Select all that apply.] - ANSWER✔✔-Hornblende


Biotite


Which property would distinguish between quartz and garnet? - ANSWER✔✔-Relief




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