Perhaps, light travels in a stationary medium {luminiferous ether} {the ether} {æther}, not vacuum. As such, because light has constant velocity in any reference frame, ether is an absolute reference frame. It is fluid but does not disperse, has no viscosity, and has high tension and is rigid. It has zero rest mass and is transparent, continuous, and incompressible. Perhaps, it appears rigid to high-velocity objects or high-frequency waves but fluid to low velocity objects or low-frequency waves. Michelson and Morley [1887] measured interference of light traveling in Earth-motion direction and in opposite direction {Michelson-Morley experiment} and found no interference and no Doppler effect, leaving no physical properties to ether and so indicating that there was no ether.
Physical Sciences>Physics>Wave>Electromagnetic
5-Physics-Wave-Electromagnetic
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Date Modified: 2022.0224