What was the specific instrument used in the Michelson-Morley experiment to detect movement through the hypothetical aether?

Answer

An interferometer

The Michelson-Morley experiment utilized an interferometer to split a beam of light, send the parts down perpendicular paths, and recombine them, expecting to measure a shift based on Earth's motion through the supposed luminiferous aether.

What was the specific instrument used in the Michelson-Morley experiment to detect movement through the hypothetical aether?

#Videos

I finally understood why speed of light is a constant! (My mind is blown)

physicslightspeedRelativityvacuum