Nuclei - Result Question 64

65. $\alpha$-particles, $\beta$-particles and $\gamma$-rays are all having same energy. Their penetrating power in a given medium in increasing order will be

[NEET Kar. 2013]

(a) $\beta, \gamma, \alpha$

(b) $\gamma, \alpha, \beta$

(c) $\alpha, \beta, \gamma$

(d) $\beta, \alpha, \gamma$

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Answer:

Correct Answer: 65. (c)

Solution:

  1. (c) Increasing order of penetrating power : $\alpha<\beta<\gamma$.

For same energy, lighter particle has higher penentrating power.