Question

n=1.35 n=135 to a medium with an indax of retra cton o4 15. T the incident ande is 30 what is the refrac η_1.5 ted angle? A ray of kght gots froma medior rth index of refraction of 13 to an unknovon index of refradio Use the anqlus in the diagrar to find the untnousn nz 20 /n-1:3

Answer 1

1) using snell's law

1.35sin30 = 1.5sin $\theta$

=>   $\theta$ = sin^-1(0.45) = 26.7437^o

2) using snell's law,

1.3sin( $\theta$ ) = n₂sin20

=> n₂ = 3.8009sin( $\theta$ )

Note:   $\theta$ is not visible in the picture, you can get n₂ by just plug in the $\theta$ value in the above relation.