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 <title>再见，黑板</title>
 <link>http://gezhi.org/node/724</link>
 <description>&lt;p&gt;黑板用完后，再次使用前就得擦。黑板是即时交流用的，不是为记录。即使使用过程中，上面的内容也会被不停地改写，删除，和更新。但是 1931 年，爱因斯坦到牛津做演讲，那时他已经是国际知名人士了。在一次报告后，他用的一块黑板被保存起来，现在成为牛津科学史博物馆的宝贝。&lt;/p&gt;
&lt;p&gt;2005 年初，为纪念狭义相对论百周年，该博物馆邀请了英国一些知名人士，让他们在同样尺寸的黑板上写点什么画点什么。所有这些黑板都被保存下来，现在就成了一个展览。黑板正迅速从会议、课堂和演讲中消失，所以他们的展览叫：“&lt;a href=&quot;http://www.mhs.ox.ac.uk/blackboard/&quot;&gt;Bye Bye Blackboard&lt;/a&gt;”。&lt;/p&gt;
&lt;p&gt;&lt;img src=&quot;http://www.mhs.ox.ac.uk/blackboard/images/einstein.jpg&quot; alt=&quot;&quot; /&gt;&lt;/p&gt;
&lt;p&gt;这就是爱因斯坦当初留下的黑板内容。据说这些公式是解释宇宙膨胀的一个简单模型。&lt;/p&gt;
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 <pubDate>Sun, 02 Sep 2007 13:56:42 -0700</pubDate>
 <dc:creator>Yan</dc:creator>
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 <title>Subtle Is the Lord: The Science and the Life of Albert Einstein</title>
 <link>http://gezhi.org/amazonnode/609</link>
 <description>&lt;p&gt;Subtle is the Lord  is widely recognized as the definitive scientific biography of Albert Einstein. The late Abraham Pais was a distinguished physicist turned historian who knew Einstein both professionally and personally in the last years of his life. His biography combines a profound understanding of Einstein&#039;s work with personal recollections from their years of acquaintance, illuminating the man through the development of his scientific thought.   Pais examines the formulation of Einstein&#039;s theories of relativity, his work on Brownian motion, and his response to quantum theory with authority and precision. The profound transformation Einstein&#039;s ideas effected on the physics of the turn of the century is here laid out for the serious reader. Pais also fills many gaps in what we know of Einstein&#039;s life - his interest in philosophy, his concern with Jewish destiny, and his opinions of great figures from Newton to Freud. This remarkable volume, written by a physicist who mingled in Einstein&#039;s scientific circle, forms a timeless and classic biography of the towering figure of twentieth-century science.&lt;/p&gt;
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 <comments>http://gezhi.org/amazonnode/609#comments</comments>
 <category domain="http://gezhi.org/keyword/42">爱因斯坦</category>
 <pubDate>Sat, 16 Jun 2007 12:31:45 -0700</pubDate>
 <dc:creator>admin</dc:creator>
 <guid isPermaLink="false">609 at http://gezhi.org</guid>
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 <title>土摩托说</title>
 <link>http://gezhi.org/node/251</link>
 <description>&lt;p&gt;土摩托，是个科学记者，他&lt;a href=&quot;http://www.sohoxiaobao.com/chinese/bbs/blog_view.asp?id=432346&quot;&gt;最新帖子&lt;/a&gt;里有这样一段话：&lt;/p&gt;
&lt;blockquote&gt;&lt;p&gt;量子物理理论预言，所有的粒子都像一朵浮云，找不出确定的轨迹。可是，相对论却并不这么认为，在相对论看来，世界是决定了的，所有的物理公式都应该板上钉钉，不存在不确定性。&lt;/p&gt;
&lt;p&gt;有趣的是，量子力学的浮云理论和相对论的决定论其实都是爱因斯坦创立的。他老人家到了晚年终于明白过来了：原来自己干了一辈子就是为这个世界发明了两种完全相反的理论，这怎么行？这个世界应该是统一的，他要找出一个终极理论，统一这个世界。可是，一直到死，他老人家都没能解决这个问题。&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;看看有几条错误。&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;8月9日更新:&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;1. 量子力学不是爱因斯坦一个人创立的，他只是贡献者之一，还有 Max Planck, Niels Bohr, Werner Heisenberg, Erwin Schrödinger, Max Born, John von Neumann, Paul Dirac, Wolfgang Pauli，等等；&lt;br /&gt;
2. 不只在相对论看来世界是决定了的，经典的物理学都是这样子，所以文中单说相对论，与量子理论相对应，是不恰当的；&lt;br /&gt;
3. 说量子力学与相对论完全相反，是怎么个考虑法？两个理论处理不同尺度的问题，不统一也不能说两种完全相反吧。&lt;/p&gt;
&lt;p&gt;问题出在，爱因斯坦与相对论在公众间的影响力实在太大了，以至于要以偏概全了。&lt;/p&gt;
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 <comments>http://gezhi.org/node/251#comments</comments>
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 <category domain="http://gezhi.org/keyword/39">土摩托</category>
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 <category domain="http://gezhi.org/keyword/40">量子力学</category>
 <pubDate>Tue, 08 Aug 2006 00:39:30 -0700</pubDate>
 <dc:creator>Yan</dc:creator>
 <guid isPermaLink="false">251 at http://gezhi.org</guid>
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