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Unit 1: Science Behind Radiological Equipment

20252m

Which is most penetrating among electron beam, gamma photons, and X-ray photons?
(i) X-rays
(ii) Alpha rays
(iii) Gamma rays
(iv) Sound waves

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Answer

Correct option: (iii) Gamma rays

Among the listed radiation types, gamma photons are highly penetrating electromagnetic radiation because of their high photon energy and lack of electric charge. Their penetration also depends on photon energy and material thickness/density.

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