Question

Sets of travelling waves are given as shown in above figure Identify which set of waves has already been through interference?

• A. A
• B. B
• C. C
• D. D
• E. E

Answer 1

The correct option is A A

In fig. $B$ and $C$ waves are travelling in same direction so they will not be superimposed on each other .In fig. $D$ and $E$ waves are coming toward each other so interference is about to occur , but in fig. $A$ waves are going away from each other therefore they have already been through interference,