Do particulate radiation particles have mass?

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Multiple Choice

Do particulate radiation particles have mass?

Particulate radiation consists of material particles that carry rest mass. Examples include alpha particles (helium nuclei), beta particles (electrons or positrons), and neutrons. Each of these has nonzero rest mass: alpha particles have about 4 amu, electrons about 0.511 MeV/c^2, and neutrons about 1 amu. Even at high speeds, the rest mass does not vanish, as shown by the relation E^2 = (pc)^2 + (mc^2)^2. Electromagnetic radiation, in contrast, is massless because photons have zero rest mass. Therefore, particulate radiation particles have mass.

Particulate radiation consists of material particles that carry rest mass. Examples include alpha particles (helium nuclei), beta particles (electrons or positrons), and neutrons. Each of these has nonzero rest mass: alpha particles have about 4 amu, electrons about 0.511 MeV/c^2, and neutrons about 1 amu. Even at high speeds, the rest mass does not vanish, as shown by the relation E^2 = (pc)^2 + (mc^2)^2. Electromagnetic radiation, in contrast, is massless because photons have zero rest mass. Therefore, particulate radiation particles have mass.

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