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The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to 1/8.

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asked Mar 30, 2018 in Physics by shabnam praween (19,050 points) ● 5 ● 6 ● 67

The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to 1/8. The thickness of lead which will reduce the intensity to 1/2 will be

(1) 6 mm

(2) 9 mm

(3) 18 mm

(4) 12 mm

1 Answer

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answered Mar 30, 2018 by santoshjha (25,550 points) ● 4 ● 5 ● 6
selected Mar 30, 2018 by Vikash Kumar
 
Best answer

The correct answer is (4)

Use I = I0 e-μx

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