Editing 1913 in science (section)

==Physics==
* [[William Henry Bragg]] and [[William Lawrence Bragg]] work out the Bragg condition for strong X-ray reflection.
* [[Niels Bohr]] presents his [[Bohr model|quantum model of the atom]].<ref>{{cite journal|url=http://web.ihep.su/dbserv/compas/src/bohr13/eng.pdf|title=On the Constitution of Atoms and Molecules|first=N.|last=Bohr|journal=[[Philosophical Magazine]] |series=Series 6|location=London|volume=26|year=1913|issue=151|pages=1–25|accessdate=2012-01-24|doi=10.1080/14786441308634955|bibcode=1913PMag...26....1B}}</ref><ref>{{cite journal|url=http://web.ihep.su/dbserv/compas/src/bohr13b/eng.pdf|title=Part II – Systems containing only a Single Nucleus|first=N.|last=Bohr|journal=Philosophical Magazine|volume=26|year=1913|pages=476–502|doi=10.1080/14786441308634993|accessdate=2012-01-24|bibcode=1913PMag...26..476B}}</ref><ref>{{cite web|title=Niels Bohr: The Nobel Prize in Physics 1922|work=Nobel Lectures, Chemistry 1922–1941|publisher=Elsevier|year=1966|url=http://nobelprize.org/nobel_prizes/physics/laureates/1922/bohr-bio.html|accessdate=2007-03-25}}</ref>
* [[William Crookes]] creates [[sunglass]] lenses.
* [[Robert Millikan]] measures the [[Elementary charge|fundamental unit of electric charge]].
* [[Georges Sagnac]] demonstrates the [[Sagnac effect]], showing that light propagates at a speed independent of the speed of its source.<ref>{{cite journal|last=Sagnac|first=Georges|year=1913|title=[[s:The Demonstration of the Luminiferous Aether|The demonstration of the luminiferous aether by an interferometer in uniform rotation]]|journal=[[Comptes rendus de l'Académie des sciences]]|volume=157|pages=708–710}}</ref><ref>{{cite journal|last=Sagnac|first=Georges|year=1913|title=[[s:On the Proof of the Reality of the Luminiferous Aether|On the proof of the reality of the luminiferous aether by the experiment with a rotating interferometer]]|journal=Comptes rendus|volume=157|pages=1410–1413}}</ref><ref>{{cite journal|last=Quintin|first=M.|title=Qui a découvert la fluorescence X ?|journal=[[European Physical Journal|Journal de Physique IV]]|year=1996|volume=6|issue=4|url=http://jp4.journaldephysique.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/jp4/abs/1996/04/jp4199606C456/jp4199606C456.html|accessdate=2012-06-21}}</ref>
* [[Johannes Stark]] demonstrates that strong electric fields will split the Balmer spectral line series of hydrogen.