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Homework Statement
http://img73.imageshack.us/img73/2750/physicsnm5.jpg [Broken]
Homework Equations
asinO=m(wavelength)
The Attempt at a Solution
I don't really know where to start...
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I did a=L(wavelength)/Y so .005=L(400nm)/.002 and got L=25m which is off, the final answer should be 20.5It's difficult to tell what you did since you did not show the numbers you plugged in. What numbers did you use, and how did you get the answer of 0.06?