Which of the following forms of radiation is in order from the most penetrating to the least penetrating?

Which of the following forms of radiation is in order from the most penetrating to the least penetrating?



A. gamma, cathode, X rays
B. gamma, X rays, cathode
C. cathode, gamma, X ray
D. cathode, X ray, gamma
E. X ray, gamma, cathode




Answer: B


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