GKFix MCQ Question

If a wave travels in the negative x-direction, what is the correct form of the wave function?

• A. y(x,t) = a sin(kx – ωt)
• B. y(x,t) = a sin(kx + ωt + φ)
• C. y(x,t) = a sin(ωt – kx)
• D. y(x,t) = a cos(kx – ωt)