<p>如图为一列沿<img src="https://file.gaojiufeng.cn/learnAppQuestion/49/3d/493db0c80221f9277fb7764a8cf7e644.jpg" style="width: 100%;height: auto;">轴传播的简谐横波的波形图，已知这列波的周期为0.2s。这列波的波长为_____<img src="https://file.gaojiufeng.cn/learnAppQuestion/2e/20/2e20da39ab25189a886a602e16ed7825.jpg" style="width: 100%;height: auto;">，波速为_____<img src="https://file.gaojiufeng.cn/learnAppQuestion/d4/f0/d4f0c35997b32fb51a13be49e39125cd.jpg" style="width: 100%;height: auto;">。[图1]<img src="https://file.gaojiufeng.cn/learnAppQuestion/9e/45/9e45385b27d0549378b0e743db480907.jpg" style="width: 100%;height: auto;"></p>