NATS 1745 Lecture Notes - Lecture 12: Bunsen Burner, Gustav Kirchhoff, Robert Bunsen
22 Jul 2017
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Document Summary
1687 publication of principia by newton. 1704 publication of opticks by newton. 1700s large telescopes of herschel and rosse. All astronomy so far was by eye; drew what they saw through telescope. Key developments in 1900s: invention of photography, invention of spectroscopy, measurement of accurate distances. Think of photography as a photon-graph (graph of light) Types of photographs were developed in diff countries. Early photographic plates were covered with a layer of chemicals ( emulsion") which were sensitive to light. When plate was exposed to light, chemical reaction occurred: Parts of plate exposed to light would become dark, and create image. Travelled to south africa and catalogued southern hemisphere stars, nebulae. Invented siano type a new method of photography. Managed to obtain first photographic image on glass plate very important for astronomy. Almost as soon as photographic techniques were invented, astronomers started using them and placing them on telescopes.
