After the Michelson-Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

Although, LIGO answer given below is very good, I'm specifically interested in the replications of MM experiment during investigations of luminiferous aether.

After the Michelson-Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

After the Michelson Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

Although, LIGO answer given below is very good, I'm specifically interested in the replications of MM experiment during investigations of luminiferous aether.

After the Michelson-Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

Although, LIGO answer given below is very good, I'm specifically interested in the replications of MM experiment during investigations of luminiferous aether.

After the Michelson Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

After the Michelson Morley (MM) experiment many scientists performed similar experiments using the original MM experimental setup, or different derivative experimental setups employing lasers and fiber optics. From MM calculations the length of the path traveled by the light along a single arm of the interferometer was important to the observation of the amount of the fringe shift. One of the subsequent Michelson experiments employed a path of light of over 30 meters (along a single arm) but also produced null result.

Which of the subsequent replications of the MM experiment (whether using fiber optic, laser, or free space interferometer) used the longest path of light along a single arm of the interferometer.

Although, LIGO answer given below is very good, I'm specifically interested in the replications of MM experiment during investigations of luminiferous aether.