Final answer:
Beta particles penetrate matter more deeply than alpha particles, and a thick wall of inert matter can help protect against both types of radiation.
Step-by-step explanation:
The question pertains to the penetration power of different types of radiation, specifically alpha and beta particles. Beta particles have a higher penetration power compared to alpha particles, meaning they can pass through matter more deeply. To protect oneself against these particles, a thick wall made of inert matter can be effective. The thickness of the wall required for protection depends on the type and energy of the radiation involved.