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 (physics only). Each one has a worked solution and a mark scheme showing where the marks go.