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The most penetrating radiation of the following is
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- gamma-rays
- alpha particles
- beta-rays
- X-rays
Correct Option: A
The penetrating power of radiation is directly proportional to the energy of its photon.
Energy of a photon
| = | ∝ | |||
| λ | λ |
| ∴ Penetrating power ∝ | λ |
λ is minimum for γ-rays, so penetrating power is maximum of γ-rays.
