GCSE P1b Refraction and Diffraction GCSE P1b Refraction and Diffraction 2.0 / 5 based on 1 rating ? PhysicsLight and OpticsGCSEAll boards Created by: MollyCreated on: 04-12-11 19:48 Diffraction 1. All waves spread out when they pass through a gap or an obstacle 2. The narrower the gap or the longer the wave, the more the wave spreads out. 3. Narrow gap = a gap almost the same size as the wave 4. Example: light can be diffracted, but as the wave length is small the gap has to be small as well. 1 of 2 Refraction 1. When a wave crosses the boundary between two substances (e.g glass -> air) it changes direction. 2. Waves are only refracted when they enter the new substance at an angle. 2 of 2
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