These links to websites might be helpful when you study.
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The Dept. of Biological Sciences at University of Delaware has a microscope Virtual Lab you can use for practice using the microscope. Click on the link. http://www.udel.edu/biology/ketcham/microscope/
Dr. Chen's Website from the Univerity of Alberta, CA shows wonderful images taken by an SEM and TEM. Click on the link. http://www.ualberta.ca/~mingchen/images.htm