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52. (a) Snell’s law gives
n
air
sin(50º) =
n
2
b
sin
θ
2
b
and
n
air
sin(50º) =
n
2
r
sin
2
r
where we
use subscripts
b
and
r
for the blue and red light rays.
Using the common approximation
for air’s index (
n
air
= 1.0) we find the two angles of refraction to be 30.176
°
and 30.507
°
.
Therefore,
∆
= 0.33
°
.
(b) Both of the refracted rays emerges from the other side with the same angle (50
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Light

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