Two radio antennas radiating in phase are located at points A and B, 200m apart. The radio waves have a frequency of 5.80MHz. A radio receiver is moved out from point B along a line perpendicular to the line connecting A and B. At what distances from B will there be destructive interference? (Note: The distance of the receiver from the sources is not large in comparison to the separation of the sources, so equation dsinθ=(m+0.5)λ does not apply.)
Reference: https://www.physicsforums.com/threads/antennas-causing-destructive-interference.596465/
