The diagram above illustrates two waves of equal amplitudes A and frequencies approaching each other. When the two waves meet at a point I midway between them, the vertical displacement of the resulting wave will be
Attached Figure / Diagram
A
0
B
\(\frac{A}{2}\)
C
\(\frac{A}{4}\)
D
\(2A\)
Verified Correct Answer: D.
Physical Principles & Numerical Solution
This is a type of constructive interference. When two waves of equal amplitude are interfering constructively, the resulting amplitude is twice as large as the amplitude of an individual wave.
= A + A = 2A
Source: Myschool Past Questions Archive (Record #49997)