A green car is lit only by red light.
What colour does the car appear, and why?
Black, because the car absorbs the red light and reflects none
Red, because the car reflects the red light that falls on it
Green, because the car always reflects its own colour of light
Brown, because the red and green light mix after reflecting
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.