Chapter 10
Electromagnetic spectrum
Electromagnetic waves form a spectrum with shared properties and different wavelengths and frequencies.
Use wave properties to explain an application or an exposure effect.
Includes all seven spectrum regions, communication and detection, heating and ionising effects. For K326 / K327 (2027) / 5086 / 5087 (2026).
Choose a topic
Spectrum order and shared properties
Connect wavelength and frequency, and distinguish electromagnetic signals from sound.
Uses across the spectrum
Explain how each region is used to transmit, heat, detect or affect materials.
Effects of exposure
Distinguish heating from ionisation and explain how over-exposure can damage cells and tissue.