A narrow beam of light travels vertically upwards through the water in a swimming pool. The surface of the water is horizontal. A light sensor is positioned in the air directly above the point where the beam meets the water surface.
Give the angle of incidence of the beam at the water surface.
Describe the path of the beam in the air, including whether it reaches the sensor.
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.