46.
(a) Approximating
n
=1forair,wehave
n
1
sin
θ
1
= (1) sin
θ
5
=
⇒
56
.
9
◦
=
θ
5
and with the more accurate value for
n
air
in Table 341, we obtain 56
.
8
◦
.
(b) Eq. 3444 leads to
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 Fall '08
 SPRUNGER
 Physics

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