The correct order of penetrating power of α-, β- and γ- rays is
- γ > α > β
- γ > β > α
- α > β > y
- β > γ > α
WBBSE
Class X
Physical Science
Atomic Nucleus
01 Mark
2023
a. α < β < γ
Explanation:
- α-rays have the least penetrating power because they are heavy and carry +2 charge.
- β-rays are lighter (electrons/positrons) and can penetrate more than α.
- γ-rays are electromagnetic waves with no mass/charge, so they penetrate the most.
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