(来学网)一平面简谐波沿x轴正向传播,已知x=L(L<λ)处质点的振动方程为y=Acosωt,波速为u,则波动方程为:
  • A.
    (来学网)y=Acosω[t-(x-L)/u]
  • B.
    (来学网)y=Acosω[t-(x+L)/u]
  • C.
    (来学网)y=Acosω[t+(x+L)/u]
  • D.
    (来学网)y=Acosω[t+(x-L)/u]