Light travels through air and enters a parallel-sided transparent plastic block at a non-zero angle of incidence.
Which statement is correct?
The frequency of the light decreases as it enters the block.
The wavelength of the light increases as it enters the block.
The angle of refraction inside the block is smaller than the angle of incidence in the air.
The light bends away from the normal as it enters the block.
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.