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
Distance from Boca Raton, FL to Surfside, FL is 41Miles or 66 Km. You can get this distance about 53 mins. If you want to planning travel with plane for 34 Miles or 54 Km, You can get this distance about 34 mins . A car with an average MPG will needs 1.9 gallons of gas to get the route between these points.