GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All have same penetrating power
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Beta Particles
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Alpha particles
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Gamma rays
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Detailed explanation-1: -Alpha particles are positively charged helium nuclei. Hence, in comparison to beta particles and gamma rays, they have considerable mass and charge and hence, they have the least penetrating power.
Detailed explanation-2: -Beta particles are more penetrating than alpha particles, but are less damaging to living tissue and DNA because the ionizations they produce are more widely spaced. They travel farther in air than alpha particles, but can be stopped by a layer of clothing or by a thin layer of a substance such as aluminum.
Detailed explanation-3: -Alpha particles cannot penetrate most matter. A piece of paper or the outer layers of skin is sufficient to stop alpha particles. Radioactive material that emits alpha particles (alpha emitters) can be very harmful when inhaled, swallowed, or absorbed into the blood stream through wounds.