Which statement about gamma radiation is accurate based on its interaction with matter?

Which statement about gamma radiation is accurate based on its interaction with matter?

• A. Gamma rays are charged particles that easily stop in air.
• B. Gamma rays have minimal penetration and can be stopped by a sheet of paper.
• C. Gamma rays are electromagnetic waves released by the nucleus that can penetrate materials and require thick shielding to absorb.
• D. Gamma rays are a form of sound wave.

Answer: (C)

Gamma radiation is made up of high-energy photons emitted from the nucleus. Because these are electromagnetic waves with no charge, they travel quickly through space and most ordinary materials, and they interact with matter mainly by scattering and absorption rather than by stopping like charged particles. To reduce exposure effectively, you need thick shielding made of dense material such as lead or concrete, since gamma rays penetrate many substances and only lose intensity gradually with thickness. This is why the statement correctly describes gamma rays as electromagnetic waves released by the nucleus that can penetrate materials and require substantial shielding to absorb. The other descriptions are inconsistent with how gamma radiation behaves: they imply charged particles, or minimal penetration, or even that gamma is a sound wave, which is not accurate.

Gamma radiation is made up of high-energy photons emitted from the nucleus. Because these are electromagnetic waves with no charge, they travel quickly through space and most ordinary materials, and they interact with matter mainly by scattering and absorption rather than by stopping like charged particles. To reduce exposure effectively, you need thick shielding made of dense material such as lead or concrete, since gamma rays penetrate many substances and only lose intensity gradually with thickness. This is why the statement correctly describes gamma rays as electromagnetic waves released by the nucleus that can penetrate materials and require substantial shielding to absorb. The other descriptions are inconsistent with how gamma radiation behaves: they imply charged particles, or minimal penetration, or even that gamma is a sound wave, which is not accurate.