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

能使涂有一层氰亚
酸盐钡的薄相纸发
,
当阴极

和相纸分别放在不同的房间时也能发
。
是他


候,在我
是两次。
科学



