What is described as a stable pattern formed by interfering sound waves?

• A. Node
• B. Standing waves
• C. Antinode
• D. Wavefront

Answer: (B)

Standing waves are the result of the interference of two or more waves of the same frequency traveling in opposite directions. This phenomenon occurs when the waves constructively and destructively interfere with each other, creating points of constant amplitude and points of zero amplitude within a medium. The stable pattern created by this interference appears to be stationary, hence the term "standing."

In a standing wave, there are specific locations called nodes, where the amplitude is always zero due to destructive interference. Between these nodes are points called antinodes, which experience maximum amplitude due to constructive interference. Although wavefronts describe the shape of waves at a given point in time, they typically refer to the geometric representation of a wave's phase rather than the specific stable pattern created by interference. Therefore, standing waves accurately encapsulate the concept of a stable pattern formed by interfering sound waves.