A technician cannot distinguish the colours of two cable tags in a poorly lit equipment room. Under a brighter inspection light, she can tell their colours apart.
Explain why the brighter light allows her to distinguish the colours.
102 exam-style questions on Edexcel GCSE Biology 2.4 The eye, covering 2.4.1 Structure and function of the eye and 2.4.2 Eye defects and their correction. Each one has a worked solution and a mark scheme showing where the marks go.