The radiation from naturally occuring radioactive substance as seen after deflection by a magnetic field in one direction are :
a) `alpha` -rays
b) `beta`-rays
c) both `alpha` and `beta` rays
d) either `alpha` or `beta`-rays

Options

A. `alpha` -rays
B. `beta`-rays
C. both `alpha` and `beta` rays
D. either `alpha` or `beta`-rays

Answer

D