Question 2

A mixture of radioactive emissions is directed from a source into a region of uniform magnetic field directed into the page, as shown in the diagram.

Radioactive emissions in a magnetic field

Which row in the table correctly identifies the emissions corresponding to Path 1, Path 2, and Path 3, and identifies which path belongs to the radiation with the highest ionizing power?

\begin{array}{|c|c|c|c|c|} \hline & \textbf{Path 1} & \textbf{Path 2} & \textbf{Path 3} & \textbf{Highest ionizing power} \\ \hline \textbf{A} & \text{Beta-minus } (\beta^-) & \text{Gamma } (\gamma) & \text{Alpha } (\alpha) & \text{Path 1} \\ \hline \textbf{B} & \text{Alpha } (\alpha) & \text{Gamma } (\gamma) & \text{Beta-minus } (\beta^-) & \text{Path 1} \\ \hline \textbf{C} & \text{Alpha } (\alpha) & \text{Gamma } (\gamma) & \text{Beta-minus } (\beta^-) & \text{Path 3} \\ \hline \textbf{D} & \text{Beta-minus } (\beta^-) & \text{Gamma } (\gamma) & \text{Alpha } (\alpha) & \text{Path 3} \\ \hline \end{array}