The linear absorption coefficient for 5-MeV gamma rays in lead is 78 ml. Find the thickness of lead required to reduce by one-fourth the intensity of beam of such gamma rays. O A. 8.9 mm B. 17.8 mm C. 3.7 mm D. 1.9 mm E. 7.4 mm
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![The linear absorption coefficient for 5-MeV gamma
rays in lead is 78 ml. Find the thickness of lead
required to reduce by one-fourth the intensity of beam
of
such
gamma
rays.
O A. 8.9 mm
B. 17.8 mm
O C. 3.7 mm
O D. 1.9 mm
O E. 7.4 mm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F75d9def7-c00b-44ff-90d1-b47c2bca34b7%2F6accec45-bfa0-40ac-a811-1e0d6bb63158%2Fjdkcjmi_processed.jpeg&w=3840&q=75)
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