I saw this live in the fall of 2009. The version linked is from 2010, pretty much the same. Recommended for the interested student. Dr. Sadoway was my recitation instructor when I took 3.091 in the late1970s. He is now doing cool stuff with batteries. https://www.google.com/search?q=sadoway&oq=sadoway&aqs=chrome..69i57j0l5.2103j0j7&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8
Discovery of the X-Ray
YouTube of MIT’s Donald Sadoway Course 3.091
http://www.youtube.com/watch?v=FVzaznYPCes (go to 23:00 to see the part about the discovery of the X-ray)