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Question
Fig. shows a radioactive source S in a thick lead walled container having a narrow opening. The radiation passes through an electric field between the plates A and B.
- Name the radiation which is unaffected by the electrostatic field.
- Which radiation is deflected the most? Give reason.
- Which among the three radiations causes the least biological damage?
- Name the radiation which is unaffected by the electrostatic field.
- Which radiation is deflected the most? Give reason.
- Which among the three radiations causes the least biological damage?
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Solution
- Gamma radiations are unaffected by the electrostatic field.
- An alpha particle consists of two protons and two neutrons and no electron. Beta particle has an electron, and thus negligible mass. The deflection shown by beta particle is much more as compared to heavier alpha particles due to this charge to mass density.
- Alpha radiations cause the least biological damage due to its least penetrating power.
- Gamma radiations are unaffected by the electrostatic field.
- An alpha particle consists of two protons and two neutrons and no electron. Beta particle has an electron, and thus negligible mass. The deflection shown by beta particle is much more as compared to heavier alpha particles due to this charge to mass density.
- Alpha radiations cause the least biological damage due to its least penetrating power.
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