Which statement best defines wave reflection?

• A. Oscillation of water in enclosed basin
• B. Waves bounce off vertical surfaces
• C. Often used incorrectly for rip current
• D. Waves spread behind obstacles

Answer: (B)

Wave reflection happens when a wave hits a boundary and bounces back, often with the direction reversing after contact. In water, this is seen when waves strike vertical surfaces like rocks, docks, or a boat and return toward the paddler. That’s why the statement that best defines wave reflection is that waves bounce off vertical surfaces.

Other ideas describe different phenomena. An oscillation in an enclosed basin is a seiche, not reflection. Rip currents are a flow of water away from shore, not a bouncing of waves. Waves spreading behind obstacles describe diffraction or shadowing, where the waves bend or spread rather than bounce back.