Beta radiation is commonly eliminated by ____________.

Beta radiation consists of high-energy, fast-moving electrons or positrons emitted during radioactive decay. These particles have a relatively low mass compared to alpha particles and can penetrate materials more easily than those. However, they can be effectively stopped by certain common materials.

The correct response indicates that either glass or plastic combined with aluminum is effective in attenuating beta radiation. This is due to the properties of these materials: plastic and glass can absorb the energy of beta particles, while aluminum adds additional mass to further provide a barrier that reduces the penetration of the radiation. The combination of these materials creates a protective barrier that is effective in stopping beta radiation, making it a practical choice for shielding.

Other materials listed may not be as effective or practical. For instance, air alone does not provide sufficient thickness to stop beta particles, and while wood can attenuate radiation, plastic is generally a more efficient barrier in this context. Lead barriers, while excellent for gamma radiation, are not necessary for beta radiation, which can be stopped by less dense materials. This underscores the effectiveness of the combination of glass or plastic with aluminum in providing adequate protection against beta radiation.