A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50% of its initial value.How thick must the lead be to reduce the beam to 1% of its initial value?

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The Answer of A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50% of its initial value.How thick must the lead be to reduce the beam to 1% of its initial value?

A Beam of 1-MeV Gamma Rays Incident on a Piece