• 2022-07-27
    一振幅为A、周期为T、波长为λ平面简谐波沿X负向传播,在X=(1/2)λ处,t=T/4时振动相位为π,则此平面简谐波的波动方程为:()
    A: y=Acos(2πt/T-2πx/λ-1/2π)
    B: y=Acos(2πt/T+2πx/λ+1/2π)
    C: y=Acos(2πt/T+2πx/λ-1/2π)
    D: y=Acos(2πt/T-2πx/λ+1/2π)