Practice Problem on Refraction
                                                       
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     90                  |                                  /
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  ------- 0      n = 1.5 |              n = 1.0          /    n = 1.9 
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    -90                  |                            /       
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Light is incident from the left at 0 degrees relative to the horizontal. What is the angle of the exiting light relative to the horizontal? Give your answer in degrees to two decimal places.

ANSWER = -14.74 degrees