Waves Revision

The Electromagnetic Spectrum

An electromagnetic wave is a wave where both electric and magnetic fields oscillate at right angles to one another. These waves are classified by wavelength, and grouped together in a continuous spectrum:

Properties of electromagnetic waves


You need to know these for the exam!

WaveWavelengths (m)
Radio106 - 10-1
Microwave10-1 - 10-3
Infrared10-3 - 7x10-7
Visible light7x10-7 - 4x10-7
Ultraviolet4x10-7 - 10-8
X-rays10-8 - 10-13
Gamma rays10-10 - 10-16