Parallel light rays strike two small regions of a rough surface. The local normals in the two regions point in different directions. Which statement explains why the reflected rays are not parallel?
the incident rays have equal incidence angles, so reflection angles must differ
the incident rays have different incidence angles, and each reflection angle equals its incidence angle
the incident rays have different incidence angles, but all reflection angles must be equal
the incident rays have equal incidence angles, and each reflection angle equals its incidence angle
93 exam-style questions on Edexcel GCSE Physics 5.1 Reflection, refraction and lenses, covering 5.1.1 Reflection, refraction and total internal reflection, 5.1.2 Specular and diffuse reflection, 5.1.3 Colour of light: absorption and filters, 5.1.4 Lenses: power, focal length and shape, 5.1.5 Ray diagrams for converging and diverging lenses, and 5.1.6 Real and virtual images. Each one has a worked solution and a mark scheme showing where the marks go.