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·伦琴偶然发现阴极射线管能使涂有一层氰亚铂酸盐钡
薄相纸发光,甚
当阴极射线管和相纸分别放在

房间时也能发光。
们发现沥青铀矿



位。
为它比较软, 我们应该能够把它锉平。
,
产生电流,进


