Demonstration of sum-over-paths or Path integral - powerful method of modern science.[br]Understanding of "integral" concept is'nt needed.

Based on material from R. Feynman' book "QED - The Strange Theory Of Light And Matter",[br]chapter 2, esp. pages 40 - 44.[br]Points A, B, M1, M2, C on Graphics 1 and phases [math] \phi_1, \phi_2 [/math] on Graphics 2[br]are movable.