Electromagnetic radiation can be produced by changes in atoms and by changes in nuclei.
In a street lamp, atoms gain energy from an electric current and then emit yellow light.
State what happens to the energy of an atom when it emits light.
Give the type of electromagnetic radiation that is produced by changes in the nuclei of atoms.
A student says:
'Changes in atoms can only produce visible light.'
Explain why the student is wrong.
Glow-in-the-dark paint absorbs ultraviolet radiation during the day. At night, the paint emits visible light.
Explain, in terms of energy, why the paint stops glowing after some time in the dark.
104 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.