A ray of light in air travels across a flat boundary into a block of transparent plastic. The angle of incidence is 54∘54^\circ54∘. The angle of refraction is 31∘31^\circ31∘.
Draw or describe a labelled diagram to illustrate this information.
Calculate the refractive index of the plastic.
A ray of light inside the plastic travels towards a flat boundary with air. The angle of incidence is 54∘54^\circ54∘. This ray does not emerge into the air. State and explain what happens to this ray.
100 exam-style questions on CIE IGCSE Physics 3.2.2 Refraction of light. Each one has a worked solution and a mark scheme showing where the marks go.