In 1895, Wilhelm Roentgen accidentally discovered that a cathode-ray tube could make a sheet of paper coated with barium platinocyanide glow, even when the tube and the paper were in separate rooms.
1895年,威廉·伦琴偶然发现阴极
线管能使涂有一层氰亚铂酸盐钡的薄
发光,甚至当阴极
线管

分别
在不同的房间时也能发光。
们发现沥青铀矿物中至少含有两

——
理
、
为它比较软, 我们应该能够把它锉平。
无线电波。


