https://scholarlywiki.org/index.php?action=history&feed=atom&title=Biography%3AJoseph_von_Fraunhofer 2026-05-23T16:18:38Z Revision history for this page on the wiki MediaWiki 1.44.5 https://scholarlywiki.org/index.php?title=Biography:Joseph_von_Fraunhofer&diff=9080&oldid=prev 2026-05-23T08:42:28Z

<p>Create biography page</p> <p><b>New page</b></p><div>{{Short description|German optician and physicist associated with solar absorption lines}}<br /> {{Infobox scientist<br /> | name = Joseph von Fraunhofer<br /> | image = Biography_Joseph_von_Fraunhofer.jpg<br /> | caption = Fraunhofer<br /> | birth_date = 6 March 1787<br /> | birth_place = Straubing, Bavaria<br /> | death_date = 7 June 1826<br /> | death_place = Munich, Bavaria<br /> | fields = Optics; spectroscopy<br /> | work_institutions = Optical Institute at Benediktbeuern; Munich<br /> | known_for = Fraunhofer lines; diffraction grating; optical glass<br /> }}<br /> <br /> &#039;&#039;&#039;Joseph von Fraunhofer&#039;&#039;&#039; (1787-1826) was a German optician and physicist known for precision optical instruments and for the dark absorption lines in the solar spectrum now called Fraunhofer lines.<br /> <br /> == Spectral lines ==<br /> Fraunhofer mapped hundreds of dark lines in the Sun&#039;s spectrum and labeled several of the strongest lines with letters. These observations were made before quantum mechanics, but they became part of the experimental background for spectroscopy and the later quantum explanation of atomic transitions.<br /> <br /> Fraunhofer also developed high-quality optical glass, improved spectroscopes, and used diffraction gratings to measure wavelengths more accurately.<br /> <br /> == Quantum Collection links ==<br /> * [[Physics:Quantum Spectral lines and series]]<br /> * [[Physics:Quantum atoms/transition]]<br /> * [[Physics:Quantum atoms/energy level]]<br /> * [[Physics:Quantum photon]]<br /> <br /> == References ==<br /> {{reflist|3}}<br /> * {{Cite web |title=Joseph von Fraunhofer |url=https://www.britannica.com/biography/Joseph-von-Fraunhofer |website=Encyclopaedia Britannica |access-date=2026-05-23}}<br /> * {{Cite web |title=Joseph von Fraunhofer |url=https://mathshistory.st-andrews.ac.uk/Biographies/Fraunhofer/ |website=MacTutor History of Mathematics Archive |access-date=2026-05-23}}<br /> <br /> {{Author|Harold Foppele}}</div>

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