X ray intensity e) Looking at the graph below for a monoenergetic X-ray X-ray intensity 250 200 150 100 50 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Thickness of lead (t) i) What is meant by half-value thickness? ii) What would you estimate the half value thickness of the material to be? iii) If the X-ray had a higher range of energies explain what would happen to the half value thickness and provide your reasoning.

X ray intensity e) Looking at the graph below for a monoenergetic X-ray X-ray intensity 250 200 150 100 50 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Thickness of lead (t) i) What is meant by half-value thickness? ii) What would you estimate the half value thickness of the material to be? iii) If the X-ray had a higher range of energies explain what would happen to the half value thickness and provide your reasoning.