![]() ![]() ![]() Grimaldi's book was little known, but his experiments were popularized in Fabri's Dialogi Physici (1669), which found its way into Newton's hands in 1672, when Collins sent him a copy, see Hall's Beyond the Fringe: Diffraction as seen by Grimaldi, Fabri, Hooke and Newton. But in a second experiment he put the cone through a second small hole, and observed what is now called "single slit" diffraction, see Crosswell, Diffraction: the first recorded observation. ![]() In the more commonly cited experiment he placed a sharp knife into the cone of light passed into a dark room through a small hole, and observed knife's anomalously wide shadow along with the colored bands which he called seriae lucidae. The discovery of diffraction and the introduction of the term are due to Grimaldi, specifically his Physico-Mathesis de Lumine posthumously published in Bologna in 1665. ![]() Fresnel explained the near-field pattern before him, in 1815, but he was not the discoverer either. Fraunhofer is credited not with discovering the single slit diffraction, but with explaining the far-field diffraction pattern from a single slit. ![]()
0 Comments
Leave a Reply. |