Why lead plate is used in alpha particle experiment?
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it helps to coliminate the alpha particle in one direction....
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Alpha particles have two units of positive and four units of mass in terms of atomic mass unit. It interacts strongly with matter and causes intense ionization. So alpha particles have a very limited range in air at STP and in denser matter have range in fraction of millimetres. The clothing we wear are sufficient to stop alpha particles. Although alpha particles are stopped by our clothing or upper layer of skin, yet can cause immense damage if ingested.
hope this helps u.....
hope this helps u.....
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