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Unformatted text preview: 68. Employing Eq. 373, we ﬁnd (with m = 3 and all lengths in µm)
θ = sin−1 mλ
(3)(0.5)
= sin−1
a
2 which yields θ = 48.6◦ . Now, we use the experimental geometry (tan θ = y/D where y locates the
minimum relative to the middle of the pattern) to ﬁnd
y = D tan θ = 2.27 m . ...
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics

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