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Size: 2018
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Size: 2197
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| Deletions are marked like this. | Additions are marked like this. |
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| The thin sections are approximately 60 microns thick, and mounted on glass slides so they can be handled. | The thin sections are approximately 30 microns thick, and mounted on glass slides so they can be handled. |
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| '''''Important Setup Notes:''''' * ''''' ''''' |
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| 1. List steps for setup then procedure. 1. ... |
Place thin section between crossed polarizers of polariscope. |
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| '''Cautions, Warnings, or Safety Concerns:''' | Rotate one polarizer (or look at thin section from different vantage point) |
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| * | Observe the changes of the colors, which are frequently quite beautiful. |
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| ||attachment: photo ||attachment: photo ||attachment: photo ||attachment: photo || | || {{attachment:Image1.jpg}} || {{attachment:Image2.jpg}} || {{attachment:Image3.jpg}} || |
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| * List any references | * Lecture on optical mineralogy: http://www.geo.arizona.edu/geo3xx/geo306_mdbarton/classonly/306%20Web%20Materials/306_Lecture041101.htm |
Rock-forming Minerals in Thin Section, 6H35.54
Topic and Concept:
Polarization, 6H35. Birefringence
Location:
Cabinet: Optics (OP)
Bay: (B5)
Shelf: #2
Abstract:
Three examples of rock-forming minerals in thin-section were kindly donated to UW Physics Lecture/Demonstration by the UW Geology Department.
Preparation and examination of thin sections is a topic in optical mineralogy, and is typically covered in the undergraduate geology major's coursework.
The thin sections are approximately 30 microns thick, and mounted on glass slides so they can be handled.
Equipment |
Location |
ID Number |
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Thin sections |
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polariscope |
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Setup and Procedure:
Place thin section between crossed polarizers of polariscope.
Rotate one polarizer (or look at thin section from different vantage point)
Observe the changes of the colors, which are frequently quite beautiful.
Discussion:
Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.
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Videos:
References:
Lecture on optical mineralogy: http://www.geo.arizona.edu/geo3xx/geo306_mdbarton/classonly/306%20Web%20Materials/306_Lecture041101.htm