teleview

Diffraction is when the Tv signal is obstructed by something in the way , like hills , mountains , tall buildings. What happens is , signal is bent slightly and a small amount is angled scattered down ward. Probing with a Tv antenna on a pole is the way to find the hot spots of the scatter. The shorter the distance behind the obstruction , the less scatter there will be , the longer the distance behind the obstruction the more scatter there will be.