It is an electron beam. In the 1890s, the latter part of the 19th century a very fashionable word was "ray."
那是个电子束,在十九世纪九十年代,就是19世纪末,一个很时髦的词汇-“光线“
And now we repeat the experiment, only this time we come with an electron beam.
现在来重复一下实验,仅在这次我们得到了电子束。
So rather than calling this an electron beam, this was called a cathode ray.
因此我们最好别叫它电子束,而是阴极射线。
There is no way that you could irradiate a crystal of nickel with a single beam of x-rays and get that circular ring pattern if the electron beam were behaving as a particle beam only.
没有什么其他的途径,可以让镍晶体发射,单束X光来,继而得到环状图案,如果电子束,是以粒子束形式出现的。
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