Question

a light ray falls on a square slab making the angle of incidence 45degree. then what must be the index of refraction of the glass if total internal reflection occurs at the vertical surface.​

Answer 1

Answer:

sin45

o

=μsinr

sinr=

2

μ

1

sin(90

o

−θ

C

)=

2

μ

1

μ

μ

2

−1

=

2

μ

1

μ

2

−1=

2

1

μ=

2

3