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Classical elements. According to ancient and medieval science, aether ( / ˈiːθər /, 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] The concept of aether was used in several theories to ...
Uranus. v. t. e. In Greek mythology, Aether, Æther, Aither, or Ether ( / ˈiːθər /; Ancient Greek: Αἰθήρ (Brightness) [ 1] pronounced [ai̯tʰɛ̌ːr]) is the personification of the bright upper sky. According to Hesiod, he was the son of Erebus (Darkness) and Nyx (Night), and the brother of Hemera (Day). [ 2] In Orphic cosmogony ...
Research fields. Past experiments. Current experiments. Scientists. v. t. e. The Michelson–Morley experiment was an attempt to measure the motion of the Earth relative to the luminiferous aether, [ A 1] a supposed medium permeating space that was thought to be the carrier of light waves. The experiment was performed between April and July ...
The luminiferous aether: it was hypothesised that the Earth moves through a "medium" of aether that carries light. 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 ...
Etheric plane. The etheric plane (see also etheric body) is a term introduced into Theosophy by Charles Webster Leadbeater and Annie Besant to represent the subtle part of the lower plane of existence. It represents the fourth [higher] subplane of the physical plane (a hyperplane ), the lower three being the states of solid, liquid, and gaseous ...
t. e. The classical elements typically refer to earth, water, air, fire, and (later) aether which were proposed to explain the nature and complexity of all matter in terms of simpler substances. [ 1][ 2] Ancient cultures in Greece, Angola, Tibet, India, and Mali had similar lists which sometimes referred, in local languages, to "air" as "wind ...
Aether theories. In the history of physics, aether theories (also known as ether theories) propose the existence of a medium, a space-filling substance or field as a transmission medium for the propagation of electromagnetic or gravitational forces. Since the development of special relativity, theories using a substantial aether fell out of use ...
Timeline of luminiferous aether. The timeline of luminiferous aether (light-bearing aether) or ether as a medium for propagating electromagnetic radiation begins in the 18th century. The aether was assumed to exist for much of the 19th century—until the Michelson–Morley experiment returned its famous null result.