35) gives
Dm = 2i – A, or i = (A + Dm)/2
       (9 37)
The refractive index of the prism is
2
21
1
sin[(
)/2]
sin[
/2]
m
A
D
n
n
n
+A
=
=
(9 38)
The angles A and Dm can be measured experimentally Equation
(9