Usage examples for optical

  1. We see his mysterious power resolved in that drawing into a simple matter of light and shade, arranged in accordance with certain optical laws. – Leading Articles on Various Subjects by Hugh Miller
  2. The Nipe had robbed an optical products company in Miami. – Anything You Can Do ... by Gordon Randall Garrett
  3. The Lectures were improving, especially in the optical part. – Autobiography of Sir George Biddell Airy by George Biddell Airy
  4. And still more if the illusion had only been partially optical, and partly the result of excited feelings. – Julian Home by Dean Frederic W. Farrar
  5. This curious appearance was at first thought to be due to some instrumental defect or optical illusion; but as it was soon confirmed by other observers with the best instruments and in widely different localities it became in time accepted as a real phenomenon of the planet's surface. – Is Mars Habitable? by Alfred Russel Wallace
  6. Instantly his legs became rigid, and he affected an interest in the horizon intended to convince the sailor that he had been the victim of an optical illusion. – The Honorable Percival by Alice Hegan Rice
  7. She thought she saw the light behind the curtains grow to a blaze, as if blown up by a pair of bellows; in another moment the gleams of flame grew brighter, and she fancied that three masked figures suddenly flashed out; but the terrible vision disappeared so swiftly that she took it for an optical delusion. – The Thirteen by Honore de Balzac
  8. This was too real, too solid, too substantial for an optical illusion! – The Lost Lady of Lone by E.D.E.N. Southworth
  9. Optical illusions with regard to directions of lines are extremely common. – Psychotherapy by James J. Walsh
  10. But yet- that door business of last night- well, if that was an optical delusion I'll never believe in my own eyesight again. – The Heath Hover Mystery by Bertram Mitford
  11. We must conclude that the effect of the ionisation due to the alpha ray has not been to alter fundamentally the conditions which give rise to the optical properties of the medium. – The Birth-Time of the World and Other Scientific Essays by J. (John) Joly
  12. The telescope of the Rocky Mountains brought the moon still nearer, but the terrestrial atmosphere singularly lessened its optical power. – The Moon-Voyage by Jules Verne
  13. 1 10 x 12 American Optical Co. – Photogravure by Henry R. Blaney
  14. At first sight we would say that some are but slightly rounded and others very deeply graduated; but as nearly as I can determine this is at least partly an optical illusion, explained by the great difference in the shape of the feathers making up the tail, which in some, as the flicker, are very broad and abruptly pointed, and in others taper gradually to the end and are very narrow for their length. – The Woodpeckers by Fannie Hardy Eckstorm
  15. Meanwhile the hidden face had flushed to the ears, and, when at length it was raised to mine, its crimson calm was as incongruous as an optical illusion. – A Thief in the Night by E. W. Hornung