At t = t₀ the shape of a pulse moving in the +x direction with speed v is f(x,t₀) = A sin(x²/a²). Which expression gives the wave at time t?

Options

• Option A

  g(x, t) = A sin{[x - v(t - t₀)]²/a²}

• Option B

  g(x, t) = A sin{[x + v(t - t₀)]²/a²}

• Option C

  g(x, t) = A sin{[x - v(t + t₀)]²/a²}

• Option D

  g(x, t) = A sin{[x + v(t + t₀)]²/a²}