Physical properties used in pulse oximetry. 1  Physical property No.1 : Amount of light absorbed is proportional to the concentration of the light absorbing substance. 2  Physical property No.2 : Amount of light absorbed is proportional to the length of the light path.
Answer OJ Simpson played his college ball at the University of Southern California between 1966-1968 and his NFL ball with the Buffalo Bills (1969-1977) and the San Francisco 49ers (1978-1979).
Kenny Washington was the first African American to be signed to an NFL team in the modern era! Charles Follis is believed to be the first African American professional footballer. He played for the Shelby Blues in the Ohio League from 1902 to 1906.