This exercise is designed to give the students a hands-on experience in which they can relate different orientations of an indicatrix to the different birefringence observed for each orientation. Each student is given a piece of fruit that has the shape of a uniaxial indicatrix - either a kiwi (uniaxial positive) or a tangerine (uniaxial negative). The student follows a set of instructions to insert toothpicks to represent the different indicatrix axes and to draw on the fruit using a permanent marker the circular and principal sections. Then the student is asked a series of questions asking them to determine the birefringence of the mineral for different orientations of the fruit.


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    Higher Education,NSDL_SetSpec_380601,Undergraduate (Upper Division),oai:nsdl.org:2200/20110519215919094T,Undergraduate (Lower Division),Vocational/Professional Development Education,Optical Mineralogy,Geoscience,NSDL



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