Standing waves are produced by
A
Waves that vibrate in a vertical plane(standing upright)
B
The motion of the source toward the observer
C
The motion of the source away from the observer
D
waves that reflect off a boundary and interfere with themselves
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Standing waves are formed when waves reflect back from a boundary and interfere with the incoming waves of the same frequency and amplitude, creating points that appear to stand still (nodes) and points of maximum oscillation (antinodes).
Source: WAEC / JAMB / NECO Classroom Archive (Record #74491)