GKFix MCQ Question

How is the net displacement y(x,t) expressed mathematically when two waves overlap?

• A. y(x,t) = y₁(x,t) × y₂(x,t)
• B. y(x,t) = y₁(x,t) - y₂(x,t)
• C. y(x,t) = y₁(x,t)/y₂(x,t)
• D. y(x,t) = y₁(x,t) + y₂(x,t)