When a light wave travels from water into air at an angle to the boundary, it changes direction (refracts). What is the cause of this change in direction?
The frequency of the light wave changes.
The speed of the light wave changes.
The amplitude of the light wave increases.
The colour of the light wave changes.
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.