Which term describes radio waves that are absorbed by an object?

• A. Reflection
• B. Absorption
• C. Scattering
• D. Diffraction

Answer: (B)

Absorption occurs when radio waves are taken into the material rather than bouncing away. The energy from the waves is absorbed by the object and often converted to heat or re-emitted at other frequencies, which reduces the amount of energy that continues on. This is different from reflection, where waves bounce off the surface; from scattering, where energy is redirected in many directions; and from diffraction, where waves bend around edges or openings. Understanding absorption helps explain why some materials weaken radio signals or radar returns when the waves pass through or strike them.