n1 sin Î¸1 = n2 sin Î¸2. This form of Snell's law was actually published by RenÃ© Descartes (1596â1650) France in La Dioptrique (1637). Snell did discover the relationship but articulated it in a different way. Today it is the form used by Descartes that is called Snell's law.. The index of refraction.
Robert Paxton Rob Gronkowski (born May 14, 1989), nicknamed  Gronk , is an American football tight end for the New England Patriots of the National Football League (NFL). He played college football at Arizona and was drafted by the Patriots with the 42nd pick in the second round of the 2010 NFL Draft.
About Rob Portman. Rob Portman is a United States Senator representing the State of Ohio. He was elected to the Senate in 2010 by an 18-point margin, winning 82 of Ohioâs 88 counties. Rob has built a reputation in the Senate as a conservative who is focused on building consensus to promote pro-growth policies that will lead to private sector job creation.