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自从放电管问世以来,人们纷纷研究真空放电,无意中生出许多课题.伦琴从管中阴极发出的射线发现了X射线,贝克勒尔又从对X射线的研究发现了铀的天然放射性,居里夫妇又进一步从对铀矿的研究发现了镭.镭可以自己发光发热,这又给物理学提出了一个无法解释的大难题.从阴极射线引出的一个链条,环环相扣,续续而生,未有穷尽.但是阴极射线本身到底是什么呢?自然有人会考虑这个问题,这个人就是英国物理学家汤姆生.
Since the advent of discharge tubes, people have been studying the vacuum discharge, inadvertently give birth to many topics.Ruqin tube from the cathodes issued by the discovery of X-rays, Becquerel from X-ray studies found that the natural uranium radioactive, Curie The couple further discovered radium from the study of uranium, radiating itself with radiance and heat, which in turn posed an inexplicably big problem for physics. A chain from the cathode ray was interlocked and continued , But there is no end, but in the end what is the cathode ray itself? Someone would naturally consider this issue, this person is the British physicist Thomson.