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JEE Main 2005
Exam
JEE Main
Year
2005
Subject
Physics
Chapter
Nuclear Physics

JEE Main 2005 · Physics · Nuclear Physics

The intensity of gamma radiation from a given source is I. On...

The intensity of gamma radiation from a given source is I. On passing through 36 mm36 \mathrm{~mm} of lead, it is reduced to I8\frac{I}{8}. The thickness of lead which will reduce the intensity to I2\frac{I}{2} will be

Options

  1. A6 mm6 \mathrm{~mm}
  2. B9 mm9 \mathrm{~mm}
  3. C18 mm18 \mathrm{~mm}
  4. D12 mm12 \mathrm{~mm}

Correct answer

D. 12 mm12 \mathrm{~mm}

Step-by-step solution

Use I =I0e−μx=I_0 e^{-\mu x}
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