Archive image from page 263 of Cytology (1961). Cytology cytology00wils Year: 1961 Horizontal vibrations entirely absorbed t \ Plane-polarized Transmitted Light Figure 11-23. Schematic Diagram Showing the Production of Plane- polarized Light by Passage of Ordinary White Light Through a Sheet of Polaroid Film. The medium contains oriented electronic resonators which transmit only those components of the incident light vibrating in a perpen- dicular plane. (From Bennett, H. 1950. 'The Microscopical Investiga- tion of Biological Materials with Polarized Light.' /// Jones, R. M. (Ed.), 'McCl
Archive image from page 263 of Cytology (1961). Cytology cytology00wils Year: 1961 Horizontal vibrations entirely absorbed t \ Plane-polarized Transmitted Light Figure 11-23. Schematic Diagram Showing the Production of Plane- polarized Light by Passage of Ordinary White Light Through a Sheet of Polaroid Film. The medium contains oriented electronic resonators which transmit only those components of the incident light vibrating in a perpen- dicular plane. (From Bennett, H. 1950. 'The Microscopical Investiga- tion of Biological Materials with Polarized Light.' /// Jones, R. M. (Ed.), 'McClung's Handbook of Microscopical Technique,' 3rd Paul B. Hoeber. Inc., Harper & Brothers, New York, N. Fig. 102, p. 614.) When placed on the stage of the polarizing microscope and rotated between crossed polarizer and analyzer, a birefrigent object shows vary- ing degrees of brightness and darkness depending on the poshion of its axis with respect to those of the analyzer (Figure 11-25). This is the usual test for birefrigence of an object. Brightness of the object is at a maximum when its axes make a ±45° angle with those of the polarizer and analyzer (Figure 11-25). Because the axes of the object are not in line with those of the analyzer, neither of the two polarized components 244 / CHAPTER 11
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