question_answer

Stationary waves are formed when [NCERT 1983]

A)            Two waves of equal amplitude and equal frequency travel along the same path in opposite directions

B)            Two waves of equal wavelength and equal amplitude travel along the same path with equal speeds in opposite directions

C)            Two waves of equal wavelength and equal phase travel along the same path with equal speed

D)            Two waves of equal amplitude and equal speed travel along the same path in opposite direction