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) $\frac{37.5}{3}\ mm$(d) $(\frac{37.5}{4})\ mm$

Answer 1

here is your answer-

option(B)

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