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State the Bragg's law and how it is used for X-ray analysis. (20 pts) 2. State the advantages of the field-emission electron gun over the tungsten...

1.      State the Bragg's law and how it is used for X-ray analysis. (20 pts)












2.      State the advantages of the field-emission electron gun over the tungsten electron gun. (20 pts)













3.      State the functions of electromagnetic lenses in an SEM/EPMA. (20 pts)

 










4.      If you have a piece of rock sample in dimensions of 10 ´ 10 ´ 10 mm3, briefly state how to prepare it for the EPMA studies. (20 pts)



















5.      When your rock sample is prepared, state what information you can get using the EPMA instrument. (20 pts)

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