question_answer

Following are expressions for four plane simple harmonic waves (i)\[{{y}_{1}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{1}}} \right)\] (ii\[{{y}_{2}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{1}}}+\pi  \right)\] (iii)\[{{y}_{3}}=A\cos 2\pi \left( {{n}_{1}}t+\frac{x}{{{\lambda }_{2}}} \right)\] (iv)\[{{y}_{4}}=A\cos 2\pi \left( {{n}_{2}}t-\frac{x}{{{\lambda }_{2}}} \right)\] The pairs of waves which will produce destructive interference and stationary waves respectively in a medium, are   JEE Main Online Paper (Held On 07 May 2012)

A) (iii, iv), (i, ii)        

B)                        (i, iii), (ii, iv)

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

D)                        (i, ii), (iii, iv)