Question 38
FThe Figure shows what happens to alpha, beta and gamma radiation from a source outside the body.
Figure
a.[1]
Use the Figure to give the radiation that cannot pass through the skin.
b.[2]
Explain why an alpha source outside the body is the least dangerous of the three.
c.[3]
Explain why an alpha source is the most dangerous of the three if it is breathed in or swallowed.
d.[2]
People who handle radioactive powders wear gloves and face masks.
Explain why.