Answer:
In second time period will be
![1.4* 10^(-6)sec](https://img.qammunity.org/2020/formulas/physics/college/upujz4a6g0kmljdrbro3m8589xl5968x6o.png)
Step-by-step explanation:
We have given the time period of wave
![T=1.4microsecond](https://img.qammunity.org/2020/formulas/physics/college/xl3s41h5wvn0jkd4cy3dkr1s81il6m3qp4.png)
We have to change this time period in unit of second
We know that 1 micro sec
![10^(-6)sec](https://img.qammunity.org/2020/formulas/physics/college/zk7x48yd4sbg7w8brp8ierqp82aykd2esi.png)
We have to change 1.4 micro second
To change the time period from micro second to second we have to multiply with
![10^(-6)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/r094xnasovgbwerv035tfqc81kol0c0lq6.png)
So
![1.4microsecond =1.4* 10^(-6)sec](https://img.qammunity.org/2020/formulas/physics/college/2hnk2dx5q50rch7tvpwxbnrg3uvex9a37b.png)