The ‘half value layer’ for gamma rays of 0.5 MeV is 0.42 cm of lead. What percentage of the original ray would penetrate four half value layers?
belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:17.2| Question number:66
All Answers
total answers (1)
Medicine
D: Four half value layers would absorb all but ½ × ½ × ½ × ½ = 1/16 (6.25 %) of the photons.
need an explanation for this answer? contact us directly to get an explanation for this answer