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Einstein's Blackboard is a blackboard which physicist Albert Einstein (1879–1955) used on 16 May 1931 during his lectures while visiting the University of Oxford in England. The blackboard is one of the most iconic objects in the collection of the Museum of the History of Science in Oxford. The lecture in which the blackboard was used was the second of three, delivered at Rhodes House in South Parks Road. Einstein's visit to give the Rhodes Lectures, and also to receive an honorary Doctor of Science degree from Oxford University on 23 May 1931, was hosted by the physicist Frederick Lindemann. Einstein's first lecture was on relativity, the second on cosmological theory, and the third one was on unified field theory. The board itself was rescued by E. J. Bowen, a chemistry don at University College in Oxford, at the end of the lecture and donated by the Warden of Rhodes House, Sir Francis James Wylie. The blackboard included equations concerning the diameter, expansion, and age of the universe. "L.J." on the blackboard indicates "light years" in German. However, the results were never published by Einstein subsequently. The blackboard is considered a "mutant" object or artefact in that it is very different from most of the objects in the collection of the museum (mainly scientific instruments such as astrolabes). A second blackboard used by Einstein during the lectures is also in the collection of the Museum of the History of Science, but is not on display. However it is of less interest because it was wiped clean after the lecture. The writing on the first blackboard, although ephemeral in nature, is now considered of historic significance. Einstein returned to Oxford to lecture again in 1933. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Einstein's Blackboard」の詳細全文を読む スポンサード リンク
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