A radioactive source emitting a mixture of alpha (α\alphaα), beta-minus (β−\beta^-β−), and gamma (γ\gammaγ) radiation is placed at the entrance of a uniform magnetic field directed perpendicularly into the page, as shown below.
Which of the following correctly identifies the paths labeled PPP, QQQ, and RRR?
P=αP = \alphaP=α, Q=β−Q = \beta^-Q=β−, R=γR = \gammaR=γ
P=β−P = \beta^-P=β−, Q=γQ = \gammaQ=γ, R=αR = \alphaR=α
P=αP = \alphaP=α, Q=γQ = \gammaQ=γ, R=β−R = \beta^-R=β−
P=γP = \gammaP=γ, Q=αQ = \alphaQ=α, R=β−R = \beta^-R=β−