Aray of light passes from air into carbon disulfide (n = 1.63) at an angle of 28.0 degrees to the normal. what is the refracted angle?

We can solve the problem by using Snell's law, which states 

where
is the refractive index of the first medium
is the angle of incidence
is the refractive index of the second medium
is the angle of refraction

In our problem,  (refractive index of air),  and  (refractive index of carbon disulfide), therefore we can re-arrange the previous equation to calculate the angle of refraction:

From which we find

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