Question

The intensity of gamma radiation from a given source is I₀.
On passing through 37.5 mm of lead it is reduced to I₀/8.
The thickness of lead which will reduce it to I₀/2 is
(a) (37.5)¹/³ mm (b) (37.5)¹/⁴ mm
(c) 37.5/3 mm (d) (37.5/4) mm

Answer 1

Explanation:

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