Department of Physics and Astronomy. Swarthmore, PA 19081 U. If chiral molecules are added to a nematic liquid crystal, the preferred direction rotates in helical fashion. If the axis of rotation is in the plane of the cell and the distance over which the preferred direction rotates a full turn is large enough, these rotations can be seen in a polarizing microscope.

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Now with hood space! Fear and Loathing over Recruitment Weekend. Is this the department for me? Which professors would I actually want to work for? How best can I take advantage of free drinks, while not getting too drunk? February 22, 2011.