Technician exam question T3A05

WhyWhen obstructions block the direct path to a distant repeater, a directional antenna can sometimes find a path that reflects signals to the repeater instead. When buildings or terrain block the direct path to a repeater, a directional antenna can sometimes still make the contact by aiming at a large flat surface, a building face or hillside, that reflects your signal around the obstruction and into the repeater, answer B. Switching polarization (A) doesn't route around a physical obstruction, the long path (C) is an HF concept involving the other way around the globe, irrelevant to a local VHF obstruction, and raising your SWR (D) only wastes power, it never helps a signal go around anything.