The Polariscope
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-490
2025-12-23
738
The study of substances by polarized light has become a matter of great importance on account of its use in the detection of adulteration; the substitution of grape sugar for cane sugar, for example. A simple polariscope serves to demonstrate many of the phenomena of polarized light nearly as well. As more elaborate apparatus. The base AB supports a vertical ground-glass plate C. A piece of black glass or a glass plate over a sheet of black paper is laid on the base at D. An arm E is fixed to the se at an angle of about 35°. K supports a Nicol's prism and L the object to be studied. Mica cut in different thicknesses gives beautiful color effects. The strained condition of the glass in a pressed bottle stopper can be detected by the appearance of dark spots as the Nicol's prism is rotated.
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