Sentence Examples

  • Experiments with gratings have been instituted by Sir G.
  • By persistent research, powerfully aided by the photographic camera and by the concave gratings invented by H.
  • In 1882, before the Physical Society of London, he gave a description of the diffraction gratings with which his name is specially associated, and which have been of enormous advantage to astronomical spectroscopy.
  • These gratings consist of pieces of metal or glass ruled by means of a diamond point with a very large number of parallel lines, on the extreme accuracy of which their efficiency depends.
  • Rowland's efforts the construction of gratings has been improved to such an extent that their use is becoming universal whenever great power or accuracy is required.

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