Concept:Penetration power refers to a radiation's ability to pass through matter. It is inversely related to the particle's mass, charge, and ionizing capability.
Solution:- Alpha particles are heavy and doubly charged, interacting intensely with matter and stopping within a few centimeters of air or a sheet of paper.
- Beta particles are lighter and singly charged, stopping at a thin sheet of aluminum.
- Gamma rays are highly energetic, massless, uncharged photons. Because they lack charge, they do not interact strongly with matter and can only be stopped by thick blocks of dense materials like lead or concrete.
Why other options are incorrect:Alpha has the lowest penetration. Beta is intermediate. They definitely do not have equal penetration power.
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