A layer of lead 0.5 mm thick will block 25% of the radiation from a particular source. What fraction of the radiation is blocked by a layer of lead of the following thickness? (a) 1.0 mm (b) 1.5 mm (c) 2.0 mm (d) 10 mm
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5 mm layer of lead. Since 25% is blocked, 75% passes through. This can be expressed as a fraction: 0.75. Show more…
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