Angle Calculation for Equilateral Prism

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To calculate the angle at which light emerges from an equilateral crown glass prism, Snell's law is applied with an index of refraction of 1.52. The initial incident angle is given as 43.5 degrees, leading to a calculated refraction angle of 26.94 degrees. The next step involves determining the incident angle on the opposite face of the prism, which requires understanding the geometry of the prism. The total internal angles of the prism must be considered to find the correct incident angle for the second refraction. Proper application of these principles will yield the correct emergence angle of the light from the prism.
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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
 
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work out the angle that it strikes the other face first and then apply Snell's law again.
 
i don't get what u mean by that?
 
The beam of light is refracted on the other surface of the prism, correct? What is the incident angle for that surface? Then you can work out the angle it leaves the prism.
 
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