Public Radio station KXPR-FM in Sacramento broadcasts at 88.9MHz. The radio waves pass between two tall skyscrapers that are 15.0 m apart along their closest walls.
(a) At what horizontal angles, relative to the original direction of the waves, will a distant antenna not receive any signal from this station?
(b) If the maximum intensity is 3.50 W/m2 at the antenna, what is the intensity at ± 5.00o from the center of the central maximum at the distant antenna?