types of radiation Flashcards
1
Q
describe alpha particles
A
alpha particles can travel few cms in air
very ionising
can be stopped by a sheet of paper
2
Q
describe beta particles
A
beta particles travel few meters in air
moderately ionising
can be stopped by 3 mm thick aluminium
3
Q
describe gamma rays
A
gamma rays can travel few kms in air
weakly ionising
can be stopped by several meters of thick lead or concrete
