Ether theory - Ether theory

Japanese: エーテル説 - えーてるせつ
Ether theory - Ether theory

...This meant that the law of velocity composition in equation (2) did not hold true, and it was a serious difficulty. Incidentally, there was a widely held discussion at that time about the ether theory, which said that electromagnetic waves travel through a hypothetical medium called the ether, which uniformly fills a vacuum and matter. Even after the Michelson-Morley experiment (which also attempted to experimentally discover the existence of a stationary ether) gave negative results, this idea was difficult to abandon. ...

*Some of the terminology explanations that refer to the "ether theory" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…これは,(2)式の速度の合成則が成り立っていないことを意味するものであり,深刻な困難であった。 ところで,この当時広く行われた議論にエーテル説なるものがあった。それは,電磁波は真空や物質の中を一様に満たしているエーテルという仮想的な媒質の中を伝わるというものであり,マイケルソン=モーリーの実験(これも静止したエーテルの存在を実験的に見いだそうとしたものである)が,これに対して否定的な結果を与えた後も,この考えはなかなか捨てられなかった。…

※「エーテル説」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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