A ray of visible light crosses from a transparent gel into mineral oil at an angle to the normal. The refracted ray in the mineral oil makes a larger angle with the normal than the incident ray in the gel.
Which statement explains this change in the direction of the light?
Its speed is unchanged; it bends only because it meets the boundary at an angle.
Its speed decreases as it passes from the gel into the mineral oil.
Its speed increases as it passes from the gel into the mineral oil.
Its speed is unchanged; it bends because the mineral oil absorbs part of the light.
93 exam-style questions on AQA GCSE Physics 6.2 Electromagnetic waves, covering 6.2.1 Types of electromagnetic waves, 6.2.2 Properties of electromagnetic waves 1, 6.2.3 Properties of electromagnetic waves 2, 6.2.4 Uses and applications of electromagnetic waves, 6.2.5 Lenses, and 6.2.6 Visible light. Each one has a worked solution and a mark scheme showing where the marks go.