A pulse of light travels through a glass block that is 30 cm long.
The speed of light in the glass is 2.0 × 108 m/s.
Calculate the time taken for the pulse to travel through the glass block.
The speed of light in air is 3.0 × 108 m/s.
Calculate how much longer the pulse takes to travel 30 cm in the glass than 30 cm in air.
The speed of light in diamond is 1.24 × 108 m/s.
A ray of light enters a block of glass and a diamond at the same angle of incidence.
Explain which material changes the direction of the ray more.
51 exam-style questions on OCR GCSE Physics 5.3 Wave interactions, covering 5.3.1 Wavelength and how substances affect waves, 5.3.2 Wave velocity in different substances, 5.3.3 Convex and concave lenses, 5.3.4 Ray diagrams for reflection and refraction, and 5.3.5 Colour, absorption and reflection. Each one has a worked solution and a mark scheme showing where the marks go.