:::::I just want to make sure that the people here criticizing LIGO understand that the frequency range of the gravitational waves it was built to detect predict a variations in spacetime by only a factor of 10^-21. LIGO's longest vacuum tubes are 4km long. So physicists are attempting to measure a change in length approximately 1/2500th the diameter of an atomic nucleus. | :::::I just want to make sure that the people here criticizing LIGO understand that the frequency range of the gravitational waves it was built to detect predict a variations in spacetime by only a factor of 10^-21. LIGO's longest vacuum tubes are 4km long. So physicists are attempting to measure a change in length approximately 1/2500th the diameter of an atomic nucleus. |