An arrow beam of monochromatic x$-$ray photons is directed from an x$-$ray tube located $50$cm above the surface of a water$-$filled container $20$cm thick. The half value layer for the beam of x$-$ray photons is $10$cm of water. The exposure at the bottom of the container relative to that incident on the surface is about what percentage?

Answer rating: 100% (QA)

In this problem we are asked to find out how much exposure there is at the bottom of a waterfilled c... View the full answer