- #1
nmsurobert
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- 36
Homework Statement
A glass prism is used to launch an evanescent wave along a glass-air interface. What is the minimum incident angle to excite the evanescent wave?
Homework Equations
The Attempt at a Solution
I don't understand what the question is asking for. I have read and reread the section in my book about evanescent waves it doesn't say anything about this? what does the question mean by "excite"?