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diff --git a/3480/CH6/EX6.3/Ex6_3.sce b/3480/CH6/EX6.3/Ex6_3.sce
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+//Example 6.3, page 129
+clc
+n1=1.50
+r1=.5//in m
+r2=-.5//in m
+d=.1//in cm
+r=-0.5//radius in cm
+p1=(n1-1)*((1/r1)-(1/r2))
+p2=-2*(1/r2)
+c=d/1
+p=(1-(c*2))*(8-.8)
+f=1/p
+H1H=(c)/(1-(c*2))
+printf("The power is %f D", p)
+printf("\nThe focal length f is %f m",f)
+printf("\nThe principal point is %f m",H1H)
+\ No newline at end of file