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Unformatted text preview: 26. Fig. 369 in the textbook is plotted versus the phase diﬀerence (in radians), whereas this problem requests
that we plot the intensity versus the physical angle θ (deﬁned in Fig. 368). The values given in the
problem imply dλ = 1000. Combining this with Eq. 3622 and Eq. 3621, we solve for the (normalized)
intensity:
I
= cos2 (1000π sin θ) .
4I0
This is plotted over 0 ≤ θ ≤ 0.0040 rad: 1
0.8
0.6
0.4
0.2 0 0.001 0.002
theta 0.003 0.004 ...
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 Fall '08
 SPRUNGER
 Physics

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