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Mr. Dubey • 100.64K Points
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Q. The half value layer of lead for Co-60 is approximately 13 mm (0.5 in). If the radiation level on the source side of a 38 mm (1.5 in) lead plate is 0.64 Gy/h (64 R/h):, the radiation level on the opposite side is:

  • (A) 0.08 Gy/h (8 R/h).
  • (B) 0.213 Gy/h (21.33 R/h).
  • (C) 0.107 Gy/h (10.67R/h).
  • (D) 0.32 Gy/h (32 R/h).
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