The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to 
. The thickness of lead which will reduce the intensity to 
will be
Text Solution
Verified by ExpertsThe correct answer is:
B
(where 
original intensity, 
changed intensity)
…… .(i)
……… (ii)
From equation (i) and (ii), 
.
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