There is no need to introduce the idea of an ether, whose presence anyway cannot be detected, as the Michelson-Morley experiment showed.
They set up, executed, and improved their techniques many times in what we call the Michelson-Morley experiment.
A coherentist account might claim that before the Michelson-Morley experiment, physics formed a coherent theory.
Some of these difficulties related to compatibility with electromagnetic theory, and the famous Michelson-Morley experiment.
The Michelson-Morley experiment was undertaken, which suggested that the speed of light is invariant.
The measurement problem was eventually solved with the Michelson-Morley experiment.
However the Michelson-Morley experiment shown that this is not true, at least not for all cases.
The Michelson-Morley experiment, which failed to detect any difference in the speed of light based on the direction of the light's movement.
A big challenge for this theory was the Michelson-Morley experiment in 1887.
As introduced, special relativity provided an account for the results of the Michelson-Morley experiments.