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## Homework Statement

Light is incident on an equilateral crown glass prism at a thetain = 43.5o angle to one face, as seen in the figure below.

http://capa-new.colorado.edu/giancoli_lib/Graphics/Graph23/gian2351.gif

Calculate the angle (thetaout) at which light emerges from the opposite face. Assume that n = 1.52.

## Homework Equations

ok so i did snells law and found it to be 26.94 deg.

so i know also that a triangle is 180 deg so i should just be able to subtract it all and get the answer

## The Attempt at a Solution

well i subtracted it and got 109.56 deg and it was wrong