The reflection coefficient hits 100% exactly at the critical angle. More rigorously, consider that an analysis of the boundary conditions at the interface requires that the two polarizations of light have reflectances:
Distance from Ruskin, FL to Palmetto, FL 18 Miles or 29 Km. How many hours? 24 mins
There are 34.33 miles from Williamston to Greenwood in southeast direction and 39 miles (62.76 kilometers) by car, following the US-178 route. Williamston and Greenwood are 58 minutes far apart, if you drive non-stop. This is the fastest route from Williamston, SC to Greenwood, SC. The halfway point is Donalds, SC.