Modern Physics 3 Question 20

20. Consider α-particles, β-particles and γ-rays each having an energy of 0.5MeV. In increasing order of penetrating powers, the radiations are

(1994, 1M)

(a) α,β,γ

(b) α,γ,β

(c) β,γ,α

(d) γ,β,α

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Solution:

  1. Penetrating power is maximum for γ-rays, then of β-particles and then α-particles because basically it depends on the velocity. However, ionization power is in reverse order.


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