College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 16

Two radio antennas separated by d = 300 m, as shown in Figure P24.7, simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1 000 m from the center point between the antennas, and its radio receives the signals. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 400 m northward, what is the wavelength of the signals (b) How much farther must the car travel from this position to encounter the next minimum in reception Hint: Do not use the small angle approximation in this problem.