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83.
(a) Employing Eq. 373 with the small angle approximation (sin
θ
≈
tan
θ
=
y/D
where
y
locates the
minimum relative to the middle of the pattern), we Fnd (with
m
= 1 and all lengths in mm)
D
=
ya
mλ
=
(0
.
9)(0
.
4)
4
.
5
×
10
−
4
= 800
which places the screen 80 cm away from the slit.
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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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