NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Nuclear Physics
NEET · Physics · Nuclear Physics
Assertion (A): Amongst (α, β) and (γ)-particles, (α)-particle has...
Assertion (A): Amongst (\alpha, \beta) and (\gamma)-particles, (\alpha)-particle has maximum penetrating power.
Reason (R): The (\alpha)-particle is heavier than (\beta) and (\gamma)-particle.
Options
- ABoth and are true, and is the correct explanation of .
- BBoth and are true, but is not the correct explanation of .
- CA is true, but R is false.
- DA is false, but R is true.
Correct answer
D. A is false, but R is true.
Step-by-step solution
The correct option is (4). Alpha particles have the least penetrating power due to their larger mass and charge, which causes them to interact more strongly with matter and lose energy quickly. Gamma rays have the maximum penetrating power because they are electromagnetic radiation with no charge and no rest mass, allowing them to pass through matter with minimal interaction. While the alpha particle is indeed heavier than beta and gamma particles, this heaviness is precisely why it has low penetrating power, not maximum.