Question

Which type of radiation is the easiest to block?

a.) gamma
b.) alpha
c.) beta
d.) delta
e.) epsilon

Answer 1

Wikipedia says:

"Alpha radiation consists of helium-4 nucleus and is readily stopped by a sheet of paper. Beta radiation, consisting of electrons, is halted by an aluminium plate. Gamma radiation is eventually absorbed as it penetrates a dense material. Lead is good at absorbing gamma radiation, due to its density."

Answer 2

So the correct answer is probably b.) alpha