Rays were first discovered by a German scientist, Wilhelm Konrad Rontgen, in 1895, almost by accident.
光最早是由一个名为威廉，K -伦琴的德国物理学家于1895年几乎是偶然发现的。
X - rays were first discovered by a German scientist, Wilhelm Konrad Rontgen, in 1895, almost by accident.
x光最早是由一个名为威廉，K -伦琴的德国物理学家于1895年几乎是偶然发现的。
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