question_answer

Four independent waves are expressed as (i)\[{{y}_{1}}={{a}_{1}}\sin \omega t\]                    (ii)\[{{y}_{1}}={{a}_{2}}\sin 2\omega t\] (iii)\[{{y}_{3}}={{a}_{3}}\cos \omega t\]and         (iv)\[{{y}_{4}}={{a}_{4}}\sin \,\,\left( \omega t+\frac{\pi }{3} \right)\] The interference is possible between

A) (i) and (iii)                           

B) (i) and (iv)

C) (ii) and (iv)                         

D) not possible at all