NATS 1870 Lecture Notes - Lecture 4: Neil Degrasse Tyson, Henrietta Swan Leavitt, Joseph Von Fraunhofer
16 Jun 2019
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Document Summary
Light as a particle and its interaction with matter ii-b. History of stellar spectroscopy: fraunhoffer"s discovery of spectral lines as the birth of astronomical spectroscopy, the legacy of women in stellar spectroscopy science. Cosmos: a spacetime odyssey (by neil degrasse tyson) Tyson proceeds to discuss the nature of light as discovered by humankind. Work by isaac newton using diffraction through prisms demonstrated that light was composed of the visible spectrum, while findings of william herschel in the 19th century showed that light also consisted of infrared rays. Joseph von fraunhofer would later come to discover that by magnifying the spectrum of visible light, gaps in the spectrum would be observed. Ibn alhazen went in search of the books: arabic was the language of science. In the 11th century ibn alhazen set about trying to test his ideas about light and how we see. He devised an experiment to determine how light moves.
