







Often as aether and more fully as luminiferous aether: a substance once thought to fill all unoccupied space that allowed electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy; its existence was disproved by the 1887 Michelson–Morley experiment and the theory of relativity propounded by Albert Einstein (1879–1955).
El concepto del éter, una sustancia hipotética que una vez se creyó que impregnaba el espacio, ahora se considera una idea científica histórica.








