Wave Speed from Standing Wave Function · CAP 2009 #18
Physics
Problem
Two sinusoidal waves traveling at the same speed in opposite directions interfere to produce a standing wave with the wave function y = (1.50 m) sin(0.400x) cos(200t), where x is in meters and t is in seconds. The speed of propagation of each of the interfering waves is
(a) 159 m/s
(b) 200 m/s
(c) 300 m/s
(d) 47.7 m/s
(e) 500 m/s