question_answer

Four light waves are represented by (i) y = a1 sinw t                                 (ii) \[y={{a}_{2}}\sin (\omega \,t+\varphi )\] (iii) \[y={{a}_{1}}\sin 2\omega \,t\]    (iv) \[y={{a}_{2}}\sin 2(\,\omega \,t+\varphi )\] Interference fringes may be observed due to superposition of

A)            (i) and (ii)                               

B)            (i) and (iii)

C)            (ii) and (iv)                            

D)            (iii) and (iv)