Question

A radioactive source X is shown in a thick lead-walled container with a narrow opening, as in the figure. The radiations travel through an electric field formed by the plates A and B.

1. Complete the diagram by indicating the paths of α-, β- and γ-radiations.
2. Why is the source X kept in a container with a thick lead wall and a narrow opening?

Answer 1

i.

ii. The radioactive substances are kept in thick lead containers with a very narrow opening so as to stop radiation coming out from other directions because they may cause biological damage.