Editing 1935 in science (section)

==Physics==
* January 8 – [[A.C. Hardy]] patents the [[spectrophotometer]].<!-- should this be under chemistry instead? -->
* February 26 – [[Robert Watson-Watt]] and [[Arnold Frederic Wilkins|Arnold Wilkins]] first demonstrate the reflection of radio waves from an aircraft, near [[Daventry]] in England;<ref>{{cite web|publisher=IET|url=http://tv.theiet.org/technology/communications/219.cfm|title=Passive Covert Radar – Watson-Watt's Daventry Experiment Revisited|access-date=2011-06-07|archive-url= https://web.archive.org/web/20110513210855/http://tv.theiet.org/technology/communications/219.cfm|archive-date=13 May 2011|url-status=live|last1=Magazines|first1=Hearst|date=June 1935}}</ref> on June 17, the first radio detection of an aircraft by ground-based [[radar]] is made at [[Orford Ness]].
* [[Albert Einstein|Einstein]], [[Boris Podolsky|Podolsky]], and [[Nathan Rosen|Rosen]] publish a paper arguing that quantum mechanics is not a complete physical theory (the [[EPR paradox]]).<ref>{{Cite web |url=https://journals.aps.org/pr/abstract/10.1103/PhysRev.47.777 |title="Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?" |access-date=2011-04-10 }}</ref> Discussion of this introduces the '[[Schrödinger's cat]]' [[thought experiment]].<ref>{{cite journal|author-link=Erwin Schrödinger|first=Erwin|last=Schrödinger|title=Die gegenwärtige Situation in der Quantenmechanik|trans-title=The present situation in quantum mechanics|journal=[[Naturwissenschaften]] |date=November 1935|doi=10.1007/BF01491891|volume =23| issue= 49| pages= 807–812|bibcode=1935NW.....23..807S|s2cid=206795705}}</ref>
* [[Jacques Yvon]] introduces ''S''-particle distribution functions in classical statistical mechanics;<ref>{{cite book|first=J.|last=Yvon|year=1935|title=Theorie Statistique des Fluides et l'Equation et l'Equation d'État|series=Actes scientifique et industrie, 203|location=Paris|publisher=Hermann}}</ref> they will later be included in the [[BBGKY hierarchy]].