Answer: Superposition of two waves traveling in opposite directions.
- A Superposition of two waves traveling in opposite directions
- B A single wave reflecting once off a rigid boundary with no return wave
- C Diffraction of a wave bending around an obstacle
- D Two waves of different amplitude travelling in the same direction
Correct answer: A. Superposition of two waves traveling in opposite directions
Explanation: Standing waves result from superposition of two identical waves traveling in opposite directions.
A standing wave forms from two identical waves travelling in opposite directions and interfering; nodes (always zero displacement) and antinodes (maximum displacement) stay fixed in place, unlike a travelling wave where the whole pattern moves.
Concept context
Wave types, superposition, standing waves, Doppler effect, and sound intensity.