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//ch-5 page 187 pb-3
//
//
dAB=100
aa=1.875
ab=1.790
le=10
ba=1.630
bb=1.560
td=aa-ab
apd=ba-bb
printf("\n first setting')
printf("\n true difference is %0.3f meters',td)
printf("\n apparent difference of level = %0.3f meters',apd)
printf("\n second setting')
A=ba-td
e1=bb-A
cA=(le/dAB)*e1
cB=((le+dAB)/dAB)*e1
printf("\n collimation error is %0.3f meters',e1)
printf("\n correction at A= %0.3f meters',cA)
printf("\n correction at B= %0.3f meters',cB)
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