A) 384 m/s
B) 768 m/s
C) 250 m/s
D) 154 m/s
Correct Answer: A
Solution :
[a] Phase difference \[=\frac{2\pi }{\lambda }\times \] path difference \[\frac{\pi }{2}=\frac{2\pi }{\lambda }\times 0.8\] \[\Rightarrow \]\[\lambda =0.8\,m\times 4=3.2\,m\] velocity \[=\lambda \times v=3.2\times 120=384\,m/s\]You need to login to perform this action.
You will be redirected in
3 sec