Homework Answers
Ratio of final intensity to initial intensity = 0.5*cos^2(theta1-theta2)
22.2/48 = 0.5 *(cos 75 - theta2)^2
22.2/(48*0.5) = (cos 75 - theta2)^2
0.925 = (cos 75 - theta2)^2
(cos 75 - theta2) = sqrt 0.925 = 0.9617
75 - theta2 = arccos 0.9617 = 15.9 degree
theta2 = 75 -15.9
= 59.1 degree answer
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