A light ray incident along vector 2i+4j+ √5k strikes on the

Last updated: 7/26/2022

A light ray incident along vector 2i+4j+ √5k strikes on the x-z plane from medium-I of refractive index 2 and enters into medium-Il of refractive index μ₂. The value of μ₂ for which the ray is just totally reflected from the boundary, is 5/4 6/5 3√3/5 8