Waves can also be separated into transverse and longitudinal waves. In a transverse wave, the motion of the particles of the medium is at right angles (i.e., transverse) to the direction the wave moves.
The experiment's name comes from the Tuskegee Institute, the black university founded by Booker T. Washington. Its affiliated hospital lent the PHS its medical facilities for the study, and other predominantly black institutions as well as local black doctors also participated.
On November 6, 1998, President Clinton approved Public Law 105-355, which established the Tuskegee Airmen National Historic Site at Moton Field in Tuskegee, Alabama, to commemorate and interpret the heroic actions of the Tuskegee Airmen during World War II.