Hi Somy, thank you for your question. The Mickelson-Morley experiment was conducted in the late 19th century to test the existence of the hypothetical substance called ether, which was believed to be the medium through which light waves traveled. The experiment involved measuring the speed of light in different directions using an interferometer, which splits a beam of light and then combines the two beams to create interference patterns. If the speed of light was affected by the presence of ether, the interference patterns would change. However, the results of the experiment showed no difference in the speed of light in different directions, leading to the conclusion that ether did not exist. This experiment played a significant role in the development of Albert Einstein's theory of relativity. I hope this helps!
