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27. Bright interference fringes occur at angles
θ
given by
d
sin
θ
=
mλ
,where
m
is an integer. For the slits
of this problem,
d
=11
a/
2, so
a
sin
θ
=2
mλ/
11 (see Sample Problem 374). The ±rst minimum of the
di²raction pattern occurs at the angle
θ
1
given by
a
sin
θ
1
=
λ
, and the second occurs at the angle
θ
2
given by
a
sin
θ
2
=2
λ
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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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