A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

“Just as light waves and sound waves bend when they hit something or change speed — a process called refraction — so do ocean waves,” explained Sally Werner, an Assistant Professor of ...

Sea waves, light waves, and Mexican waves are ... tanks to investigate different wave patterns and the reflection, refraction and superposition (adding or cancelling out) of waves.