At night, the headlights of a car shine on the road ahead.
When the road is dry, the driver can see the road surface clearly. When the road is covered by a smooth layer of water, the road ahead looks dark to the driver, but drivers coming the other way see a bright glare.
Explain why the driver can see the dry road surface clearly.
Explain why the wet road looks dark to the driver but causes a glare for drivers coming the other way.
The law of reflection applies to every ray that reflects from the dry road.
Explain why rays of light that arrive parallel to each other leave the dry road in many different directions.
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.