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
Rusk is crossed by U.S. Routes 69 and 84. US 69 leads northwest 14 miles (23 km) to Jacksonville, the largest city in Cherokee County, and southeast 43 miles (69 km) to Lufkin, while US 84 leads east 30 miles (48 km) to Mount Enterprise and west the same distance to Palestine.