A progressive wave travelling along the positive x-direction is represented by y(x, t) = A sin (kx - ωt + φ). Its snapshot at t = 0 is given in the figure: For this wave, the phase φ is:

Question

G1 Physics · Accepted Answer

Step 1: Compare with y = A sin(ωt ± kx + φ): f = ω/(2π), λ = 2π/k and wave speed v = ω/k. Step 2: The sign of kx fixes the propagation direction; particle motion follows ∂y/∂t. Step 3: Apply these to the given coefficients. Final: C: π.