Which one of the following is most penetrating?alpha particlesbeta particlesgamma rayspositrons
gamma rays Alpha particles are the least penetrating not able to pass through a single sheet of paperBeta particles can penetrate through a sheet of paper but not a piece of aluminumGama rays can travel through both paper and aluminum but not leadThe positron is an anti-electron (antimatter), and it will have little power to penetrate anything, even at high energyA thin sheet of aluminum foil will stop it.
