Which of the following is/are correct about standing wave? i. It results from superimposed waves moving in same direction. ii. It is a sum of two…
Which of the following is/are correct about standing wave? i. It results from superimposed waves moving in same direction. ii. It is a sum of two interfering light waves. iii. It is a vector sum of two reflected sound waves. iv. It can also be called stationary wave.
A standing (stationary) wave forms when two waves of the same frequency travel in opposite directions and overlap, such as a wave and its reflection. It does not move along; it has fixed nodes and antinodes.
Statement (i) is false because the waves must move in opposite directions, not the same direction. Statement (ii) describes interference in general, not specifically a standing wave. Statement (iii) is true: reflected sound waves add up to give a standing wave, for example in an air column. Statement (iv) is true: “stationary wave” is another name for it.
So the answer is iii and iv.
Was this explanation helpful?
Something wrong or missing? Tell us — we read every report and fix issues fast.