Physics
Assertion (A): Out of α, β and γ radiation, α-particles have maximum penetrating power.
Reason (R): The α-particles are the heaviest amongst the three.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Radioactivity
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Answer
assertion is false but reason is true.
Explanation
Assertion (A) is false. Out of α, β and γ radiation, γ-particles have maximum penetrating power.
Reason (R) is true. The penetrating power of a particle depends upon the energy carried by it, its mass and the charge carried by it. A particle with a greater energy can use it to force itself into another medium and thereby penetrate it. α-particles rapidly dissipates its energy as it moves through the medium and therefore its penetrating power is quite small.
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