试题与答案

(选修3-4选做题) 一简谐横波沿x轴正向传播,t=0时刻的波形如图(a)所示,

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题目:

(选修3-4选做题)

一简谐横波沿x轴正向传播,t=0时刻的波形如图(a)所示,x=0.30m处的质点的振动图线如图(b)所示,该质点在t=0时刻的运动方向沿y轴_______(填“正向”或“负向”)。已知该波的波长大于0.30m,则该波的波长为_______m。

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