The concept of the invisible ether or ‘aether’ is an old concept dating to the time of the ancient Greeks. They considered the ether as that medium which permeated all of the universe and even believed the ether to be another element. Along with Earth, Wind, Fire and Water Aristotle proposed that the ether should be treated as the fifth element or quintessence; this term which literally means ‘fifth element’ has even survived down to the present day to explain an exotic form of ‘dark energy’ which is crucial in some cosmological models. These ideas spread throughout the world until the advent of a new springtime in scientific thought. The first person in the modern era to conceive of the idea of an underlying ether to support the movement of light waves was seventeenth century dutch scientist Christiaan Huygens.
Many others followed in expressing their opinions on the ether concept. Whilst Isaac Newton disagreed with Huygens wave theory he also wrote about the ‘aethereal medium’ although he expressed his consternation in not knowing what the aether was. Newton later renounced the ether theory because in his mind the...
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