Problem 1: The figure below shows four identical point sources of sound that are uniformly spaced on an x-axis. d -d The sources emit sound at the same wavelength A and same amplitude A, and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of A is the amplitude of the net wave at P if distance d in the figure is (a) X/4, (b) A/2, and (c) X?

Problem 1: The figure below shows four identical point sources of sound that are uniformly spaced on an x-axis. d -d The sources emit sound at the same wavelength A and same amplitude A, and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of A is the amplitude of the net wave at P if distance d in the figure is (a) X/4, (b) A/2, and (c) X?