Ether, it was Michaelson and Murray who wanted to measure it and didn't. The equipment used in the comparison of the two detection experiments was basically the same, with two light arms perpendicular to each other. Michaelson believed that these two light arms alone should be able to obtain interference images, thus proving the existence of Ether. In addition to the significant increase in sensitivity of this device, today's experimenters accepted that two vertical light arms will not appear due to the rotation of the earth," the emergence of gravitational waves only caused the two light arms to produce a light travel difference, thus obtaining an image of the interference that symbolizes gravitational waves. With the interference image, the existence of Ether is well demonstrated.
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