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Solution : + From where and Beer - Lambert's law I = I, e-MX x = thickness = 3 HUL 1 HVL = ln 2 le 1. u= ln 2 HVL then I = In 2) x 3 Hut HVL e = è ln 8 HH HILO Hola HIK e in = . Intensity is reduced by factor of 8.
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