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mutineer123
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Homework Statement
http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s02_qp_2.pdf
question no. 7b
Homework Equations
dsin∅=nλ
The Attempt at a Solution
I subtracted the two angles and got 26 degrees. So then I plugged it all into the equation:
dsin26=2 X 630x10^-9.
My answer is half the actual answer because the angle the answer sheet has is 13 degree. Why do they take it as 13 degree??