Type of various airfoils first of all, airfoil was just curved plates. ... It has a fully curved top and a half curved botto flights. They look extremely thin. ... They have a flat upper surface, a highly cambered aft and a greater leading edge radius.
A convex-planar lens of index 3/2 has a thickness of 1.2 cm and a radiusof curvature of 2.5 cm. ... A concave-planar glass (n=1.50) lens in air has a radiusof 10.0 cm and a thickness of 1.00 cm. ... f _{combine} =4.47 cm Therefore f = 33.02 ----------------------------------------------------------