如图所示,实线为简谐波在t时刻的图线,虚线为波在(t+0.01)s时刻的

如图所示,实线为简谐波在t时刻的图线,虚线为波在(t+0.01)s时刻的图线

(1)若波向左传播,求它可能传播的距离?

(2)若波向右传播,求它的最大周期?

(3)若波速为500 m/s,指出简谐波的传播方向

 

答案

(1)△x1=3+4n   (n=0,1,2……)(2)0.04s(3)向右传播

解析:(1)向左传播时,△x1=3+4n   (n=0,1,2……)

(2)向右传播时,T=0.04/(4n+1)  (n=0,1,2……)

n=0时,T有最大值0.04s

(3)向右传播时,△x2=4n+1   (n=0,1,2……)

x=vt=5 m,当n=1时满足。故波向右传播

 

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