Describe how wavelength changes across the electromagnetic spectrum.

Wavelength decreases across the electromagnetic spectrum from radio waves to gamma rays. Radio waves have the longest wavelengths, while gamma rays have the shortest. Students should link this trend to frequency using v = f? for waves travelling at the same vacuum speed. The key boundary is that wavelength is a distance between matching points on a wave, not the same idea as amplitude, intensity or radiation hazard. Within the subtopic Types of electromagnetic waves in Electromagnetic waves, the explanation is anchored to electromagnetic spectrum, wavelength and uses those terms in the approved AQA GCSE Physics Waves context.