nisind : nsind 6. A high-index lens with refractive index 1.7 is coated with a material of refractive index 1.3 in order to minimize reflections of light with wavelength 550 nm. What is the minimum thickness of such a coating? A. 162 nm n 1= 1.7 1 = 5 5 0nm B. 210 nm n 2 = 1. 3 C. 81 nm f = c = (1. 7- 1. 3)/ + D. 106 nm E. 137 nm R = 2 F = 21 R = = 7. A beam of light is traveling inside of a large diamond. It strikes the interface between