At 400 nm, A = 0.030 = e cl = 2000 (c) 1

c = 0.030/2000 = 1.5X10-5 and c is constant.

At 600 nm and l = 50.0 cm; A = e cl = 3000(1.5X10-5)(50.0cm) = 2.25

A = 2.25 = log(I0/I)

I0/I = antilog 2.25 = 178

%T = (I/I0)100 = 100/178 = 0.56%

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