IN 1911, A British scientist named C. T. R. Wilson was studying cloud formations bytramping regularly to the summit of Ben Nevis, a famously damp Scottish mountain, when itoccurred to him that there must be an easier way to study clouds. Back in the Cavendish Labin Cambridge he built an artificial cloud chamber—a simple device in which he could cooland moisten the air, creating a reasonable model of a cloud in laboratory conditions.

The device worked very well, but had an additional, unexpected benefit. When heaccelerated an alpha particle through the chamber to seed his make-believe clouds, it left avisible trail—like the contrails of a passing airliner. He had just invented the particle detector.

Loading...

未加载完，尝试【刷新网页】or【关闭小说模式】or【关闭广告屏蔽】。

使用【Firefox浏览器】or【Chrome谷歌浏览器】打开并收藏！

移动流量偶尔打不开，可以切换电信、联通网络。

收藏网址：www.ziyungong.cc

(＞人＜；)