The inteisity of gamma radiation from a given source is `I_(0) ` . On passing throug 37.5 mm of lead it is reduced to `I_(0) // 8.` the thickness of lead which will reduce It to `I_(0) //2` is -

Options

A. `(37.4 )^(1//3) mm`
B. `(37. 5)^(1//4) mm`
C. `(37.5//3) mm`
D. `(37.5//4)` mm

Answer

C