The speed of light in air is known to be 3.0 × 108 m/s.
Outline how you would use a refraction experiment to deduce the speed of light in a rectangular plastic block. You may draw a diagram if it helps to clarify your answer.
An underwater volcanic eruption occurs under the ocean.
Waves on the surface of the water from the eruption have a wavelength of 150 m and travel at a speed of 30 m/s.
Calculate the frequency of these surface water waves.
The sound wave from the eruption travels through the ocean water at 1.5 × 103 m/s.
The marine research station detecting these signals is located on the coast, at a distance of 1.8 × 104 m from the eruption.
Calculate how much warning of the arrival of the surface water waves at the station is given by the detection of the underwater sound wave.
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.