Humboldt Library of Science Volume 37

Humboldt Library of Science Volume 37

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 edition. Excerpt: ...tourmalines, light takes the place of darkness. The darkness, in fact, seemed scraped away as if it were something material. This effect has been called--and improperly called--depolarization. augment the quantity of the transmitted polarized light; and, by taking a bundle of plates, we LECTURE IV. Chromatic Phenomena produced by Crystals on Polarized Light: The Nicol Prism: Polarizer and Analyzer: Action of thick and thin Plates of Selenite: Colors dependrn. on Thickness: Resolution of Polarized Beam into two others by the Selenite: One of them more retarjed than the other: Recompounding of the two Systems of Waves by the Analyzer: Interference thus rendered possible: Consequent Production of Colors: Action of Bodies Mechanically strained or pressed: Action of Sonorous Vibrations: Action of Glassstrained or pressed by Heat: Circular Polarizatioo: Chromatic Phenomena produced bv Quartz: The Magnetization of Light: Rings surrounding the Axes of Crystals: Biaxal and Uniaxal Crystals: Grasp of the Undulatory Theory. We now stand upon the threshold of a new and splendid optical domain. We have to examine, this evening, the chromatic phenomena ptoduced by the action ot crystals, and double-refracting bodies geneially, upon polarized light. For a long time investigators were compelled to employ plates of tourmaline for this purpose, and the progress they made with so defective a means of inquiry is astonishing. But these men had their hearts in their work, and were on this account enabled to extract great results from small instrumen tal appliances. But we have better apparatus now. You have seen the two beams emergent from Iceland spar, and have proved them to be polarized. If we could abolish ene of these beams, we might employ the other for..
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Product details

  • Paperback | 44 pages
  • 189 x 246 x 2mm | 95g
  • United States
  • English
  • black & white illustrations
  • 1236852362
  • 9781236852366