电学现象:磁学是在古代发现的。希腊牧羊人马格尼斯无法将他的铁棍从地面上分离出来。他发现这种现象来自于一种叫做磁性氧化物或磁性氧化物的石头的吸引。佚名说明(Electrical phenomena: magnetism was discovered in Antiquite. The Greek shepherd Magnes could not detach his iron stick from the ground. He found that this phenomene came from the attraction of a stone called magnetic oxide or magnetic oxide. Anonymous illu)匿名匿名 |
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日期不详 · Engraving
· 图片ID: 925426
Private Collection / Bridgeman Images |
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