Two new words have appeared on the GCSE Physics syllabus - speuclar reflection is for when all reflected rays are parallel to each other and make a coherent reflection. Diffuse means that the reflection is from a rough surface. For each ray, angle of incidence = angle of reflection. Even if the incident rays go in parallel to each other they won't all have the same angle of incidence because the of the uneveness of the surface. The reflected rays will not be parallel to each other. The waves were driving in from the left in the middle picture. look how rough the profile of Carraig Fhada is. Diffuse reflection was making for a rough sea that day.
