Which of the following rays has the highest capacity to ionise gases?
(a) α-ray
(b) γ-ray
(c) β-ray
(d) Light ray
WBBSE
Class X
Physics
Atomic Nucleus
01 Mark
2025
(a) α-ray
Explanation
Alpha (α) rays have the highest ionising power because they possess a +2 charge and comparatively large mass.
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