A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...
THE revised edition of Prof. SouthalPs text-book of geometrical optics, in addition to a number of new problems scattered throughout the book, contains an important new chapter at the end of the ...
THIS useful book on geometrical optics has been enlarged and improved by the addition of two new chapters. One of these deals with the microscope considered as being more or less typical of optical ...
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