Weegy: Refraction is the bending of a wave when it enters a medium where it's speed is different. User: For refraction to occur in a wave, the wave must (1 point)
strike an obstacle larger than the wavelength.
change direction within a medium.
enter a new medium at an angle.
enter a new medium head-on. Weegy: C. enter a new medium at an angle. User: What is one property of a wave that determines how much it will diffract when it ... (More)