Решение задачи по физике раздел 37 пункт 98 волны

98. Two dots lie on the beam and are the source of fluctuations in the distance x1 = 4 m and x2 = 7 m. The oscillation period T = 20 ms and the wave propagation velocity υ is 300 m / s. Determine the phase difference of these points.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)