Question 63 Chapter 8
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Ive viewed the souloution for problem 63 at chapter 33 wich ishttp://www.cramster.com/solution/solution/516194I get it until they take 75,54 + alpha = 90why does it equal 90?and why do you use snells law after this?
Basically my question is problem 63. I have no idea how to even start it apparently, so.. halp T.T
CH.22 Problem 63