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92.
(a) In the notation of this problem, Eq. 3447 becomes
θ
c
= sin
−
1
n
3
n
2
which yields
n
3
=1
.
39 for
θ
c
=
φ
=60
◦
.
(b) Applying Eq. 3444 law to the interface between material 1 and material 2, we have
n
2
sin 30
◦
=
n
1
sin
θ
which yields
θ
=28
.
1
◦
.
(c) Decreasing
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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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