Question

If an x-ray beam is incident on a 3mm thick sample and 50% of the beam is transmitted what is the average absorption coefficient of the material ?

Answer 1

$$e^{-\mu x}=0.5$$

$$\mu=\frac{\ln{2}}{x}$$

$$\mu=\frac{\ln{2}}{0.003}=231\ m^{-1}$$