Six lectures on light [electronic resource] : delivered in the United States in 1872-1873 (1882)
Tyndall, John, 1820-1893, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services, University College, London. Library Services · London : Longmans, Green, and Co. · leaf 167
have upon the screen a beautiful system of iris-rings sur- rounding the end of the optic axis, the circular bands of colour being intersected by a black cross (fig. 45). The arms of this cross are parallel to the two direc- tions of vibration in the polarizer and analyzer. It is easy to see that… … With monochromatic light the rings would be simply bright and black— the bright rings occurring at those thicknesses of the spar which cause the rays to con- spire; the black rings at those thicknesses which cause them to quench each other. Turning the analyzer 90° round, we obtain the…
Boyle, Robert, 1627-1691 · Young, Thomas, 1773-1829 · Arago, F. (François), 1786-1853 · Light · Wave theory of light · Optical illusions · Gravitation · Vision
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.
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