A sheet of paper is placed in the path of a beam from a radioactive source. The emissions that pass through the paper consist of
- alpha particles and gamma rays
- alpha and beta particles
-
beta particles and gamma rays
- alpha particles only
The correct answer is: C
Explanation
Among the three types of radiations, alpha, beta and Gamma rays, it is only alpha rays that cannot penetrate a piece of paper or human hand, as it has the lowest penetrating power though the highest ionizing power. However, Beta particles and Gamma rays can pass through or penetrate a piece of paper. Option C is the correct answer.