Among alpha, beta and gamma radiation, the most penetrating is:
AGamma rays, since they are high-energy uncharged photons
BAlpha particles, since they are the heaviest of the three
CBeta particles, with mass equal to that of an electron
DAll three penetrate equally, since each carries similar energy
Answer & Solution
Correct answer: A. Gamma rays, since they are high-energy uncharged photons
Alpha is stopped by paper, beta by aluminium foil, gamma needs lead. Gamma is most penetrating.
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