横波如图所示,t1时刻波形为图中实线所示,t2时刻波形如图中虚线所示.已知t=t2-t1=0.5s,且3T
人气：303 ℃ 时间：2019-11-13 04:36:41
解答
（1）如果波向右传播,则t时间内传播了（n+1/4）T,即t=13/4T,T=4/13t
波长λ=4m
波速v=λ/T=26m/s
（2）如果波向左传播,则t时间内传播了（n+3/4）T,即t=15/4T,T=4/15t
波速v=λ/T=30m/s
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