A scuba diver is submerged in a calm lake and shines a narrow beam of light from an underwater torch upwards towards the surface. The angle of incidence of the light beam at the water-air interface is greater than the critical angle.
Describe what happens to the beam of light at this boundary.
24 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.