In (ELEMENTS OF X-RAY DIFFRACTION) book, chapter1, question 1-6 page 31: Graphically verify Eq. (1-13) for a lead absorber and Mo Ka, Rh Ka, and Ag...

In (ELEMENTS OF X-RAY DIFFRACTION) book, chapter1, question 1-6 page 31:

Graphically verify Eq. (1-13) for a lead absorber and Mo Ka, Rh Ka, and Ag Ka radiation. (The mass absorption coefficients of lead for these radiations are 122.8, 84.13, and 66.14 cm2/gm, respectively.) From the curve, determine the mass absorption coefficient of lead for the shortest wavelength radiation from a tube operated at 30,000 volts.