question_answer

Following are expressions for four plane simple harmonic waves                                [JEE ONLINE 07-05-2012] (i) (ii (iii) (iv) The pairs of waves which will produce destructive interference and stationary waves respectively in a medium, are

A)  (iii, iv), (i, ii)                 

B)  (i, iii), (ii, iv)

C)  (i, iv),(ii, iii)                  

D)  (i, ii), (iii, iv)

Correct Answer: D

Solution :

[d] In case of destructive interference

Phase difference or

So wave pair (i) and (ii) will produce destructive interference.

Stationary or standing waves will produce by equations (iii) & (iv) as two waves travelling along the same line but in opposite direction.