A ray of light in glass is incident on the boundary with air. The angle of incidence is greater than the critical angle. What happens to this ray?
It is completely reflected.
It is completely refracted.
It is partially reflected and partially refracted.
It is refracted at an angle of refraction of 90∘90^\circ90∘.
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.