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प्रश्न
Which one of the following has least ionising power?
विकल्प
γ-rays
X-rays
beta particles
alpha particles
MCQ
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उत्तर
γ-rays
Explanation:
γ-rays are electromagnetic waves with no charge or mass, so they ionise matter the least.
Ionising power decreases in the order:
α-particles > β-particles > γ-rays
Thus γ-rays have the least ionising power.
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