Which term is described as the wrap-around obstruction phenomenon?

• A. SERRATED RANGE RINGS
• B. Water in the Waveguide
• C. Diffraction
• D. Sub Refraction

Answer: (C)

Diffraction explains the wrap-around behavior of waves when they meet an obstruction. When the radar wavefront encounters an object whose size is comparable to the wavelength, the energy bends around the edges and can propagate into the shadow region behind the obstacle. This is why signals can be detected or seen to wrap around corners, rather than being completely blocked. It’s a fundamental wave property, unlike other options: serrated range rings would be a display artifact, water in the waveguide is about attenuation from moisture, and sub refraction is atmospheric bending of rays, not energy wrapping around an object.