Which type of radiation is denoted by the symbol γ and has no mass with high penetration?

Which type of radiation is denoted by the symbol γ and has no mass with high penetration?

• A. Alpha particle
• B. Beta particle
• C. Gamma radiation
• D. Neutron

Answer: (C)

Gamma radiation is high-energy electromagnetic radiation that consists of photons with no rest mass and no electric charge, so it travels at the speed of light. Because these photons have no mass or charge, they interact weakly with matter and can penetrate deeply, requiring dense shielding like thick layers of lead or concrete to reduce their intensity. The symbol γ is used for these gamma rays. In contrast, alpha particles are massive, positively charged nuclei; beta particles are fast electrons or positrons with mass and charge; and neutrons have mass even though they are neutral. These differences in mass, charge, and interaction cause alpha and beta radiation to be stopped more easily and neutrons to behave differently in shielding.

Gamma radiation is high-energy electromagnetic radiation that consists of photons with no rest mass and no electric charge, so it travels at the speed of light. Because these photons have no mass or charge, they interact weakly with matter and can penetrate deeply, requiring dense shielding like thick layers of lead or concrete to reduce their intensity. The symbol γ is used for these gamma rays. In contrast, alpha particles are massive, positively charged nuclei; beta particles are fast electrons or positrons with mass and charge; and neutrons have mass even though they are neutral. These differences in mass, charge, and interaction cause alpha and beta radiation to be stopped more easily and neutrons to behave differently in shielding.