An energy-efficient lamp contains a coating on the inside of its tube. Ultraviolet is produced inside the tube, and the lamp gives out visible light.
Why can the lamp produce visible light when ultraviolet is generated inside it?
The coating reflects ultraviolet as visible light.
The coating transmits ultraviolet as visible light.
The coating slows the ultraviolet down, which turns it into visible light.
The coating absorbs ultraviolet and re-emits visible 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.