N=1.41 Index Of Refraction What Is The Index Of Refraction Of The Core Of An Optical Fiber If The Cladding Has N = 1.41 And The Critical?

What is the index of refraction of the core of an optical fiber if the cladding has n = 1.41 and the critical? - n=1.41 index of refraction

What is the refractive index of the heart of an optical fiber coating, when n = 1.41 and critical angle is in the middle in front of the border 46.0 °?