Question:

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 to

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
(A) 5/4
(B) 6/5
(C) 3√3/5
(D) 8

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 (A) 5/4 (B) 6/5 (C) 3√3/5 (D) 8

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