The penetrating powers of α, β and γ radiation in decreasing order are
Question and options
The penetrating powers of α, β and γ radiation in decreasing order are
- γ, α, β
- γ, β, α
- α , β, γ
- β, γ, α
Answer and explanation
Correct answer: B - γ, β, α
Gamma rays are most penetrating, then beta particles, then alpha particles (stopped by paper): gamma > beta > alpha. Alpha particles, being heavy and doubly charged, ionise strongly and lose their energy over the shortest distance.
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