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  2. Ether - Wikipedia

    en.wikipedia.org/wiki/Ether

    In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. [3] The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp 3.

  3. Aether theories - Wikipedia

    en.wikipedia.org/wiki/Aether_theories

    In the 19th century, luminiferous aether (or ether), meaning light-bearing aether, was a theorized medium for the propagation of light. James Clerk Maxwell developed a model to explain electric and magnetic phenomena using the aether, a model that led to what are now called Maxwell's equations and the understanding that light is an ...

  4. Aether (classical element) - Wikipedia

    en.wikipedia.org/wiki/Aether_(classical_element)

    According to ancient and medieval science, aether (/ ˈ iː θ ər /, alternative spellings include æther, aither, and ether), also known as the fifth element or quintessence, is the material that fills the region of the universe beyond the terrestrial sphere. [1]

  5. Lorentz ether theory - Wikipedia

    en.wikipedia.org/wiki/Lorentz_ether_theory

    A big challenge for the Lorentz ether theory was the Michelson–Morley experiment in 1887. According to the theories of Fresnel and Lorentz, a relative motion to an immobile aether had to be determined by this experiment; however, the result was negative.

  6. Michelson–Morley experiment - Wikipedia

    en.wikipedia.org/wiki/Michelson–Morley_experiment

    The Experiments on the relative motion of the earth and ether have been completed and the result decidedly negative. The expected deviation of the interference fringes from the zero should have been 0.40 of a fringe – the maximum displacement was 0.02 and the average much less than 0.01 – and then not in the right place.

  7. Ether cleavage - Wikipedia

    en.wikipedia.org/wiki/Ether_cleavage

    Ether cleavage refers to chemical substitution reactions that lead to the cleavage of ethers. Due to the high chemical stability of ethers, the cleavage of the C-O bond is uncommon in the absence of specialized reagents or under extreme conditions. [1] [2] In organic chemistry, ether cleavage is an acid catalyzed nucleophilic substitution reaction.

  8. Luminiferous aether - Wikipedia

    en.wikipedia.org/wiki/Luminiferous_aether

    Luminiferous aether or ether [1] (luminiferous meaning 'light-bearing') was the postulated medium for the propagation of light. [2] It was invoked to explain the ability of the apparently wave-based light to propagate through empty space (a vacuum), something that waves should not be able to do. The assumption of a spatial plenum (space ...

  9. Aether - Wikipedia

    en.wikipedia.org/wiki/Aether

    Ether, a class of chemical compounds Diethyl ether, or simply ether, an organic compound; Petroleum ether, a petroleum fraction (not classified as an ether) AETHER, an atmospheric radiative transfer algorithm; Efir, now called "Sfera," is a telecommunication project of the Russian Federation aiming to create a national Satellite constellation

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    valence bond theory etherdimethyl ether bond angle
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