The Table shows the frequencies of four types of electromagnetic radiation, W, X, Y and Z.
Table
| Radiation | Frequency in Hz\text{Hz}Hz |
|---|---|
| W | 1 × 1021 |
| X | 5 × 1014 |
| Y | 1 × 1010 |
| Z | 1 × 1016 |
Give the letter of the radiation with the greatest potential danger.
Give a reason for your answer.
Radiation X is the only radiation in the Table that our eyes can detect.
Give the name of radiation X.
Radiation Y is used to cook food.
Give the name of radiation Y and describe the harmful effect on people of excessive exposure to radiation Y.
Radiation W is emitted by the nuclei of some atoms. It is used to treat cancer.
Explain why the beam of radiation W must be directed carefully at the tumour.
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.