The Electromagnetic Spectrum

Light and the Electromagnetic Spectrum

The visible light that has been the focus of this unit so far is only actually a very small section of a much larger spectrum - the Electromagnetic spectrum.

The video below gives an introduction to light and the EM Spectrum, as well as giving a taster of some of Higher and Advanced Higher Physics:-

Like light, all sections of the Electromagnetic spectrum:-

1. Made up of changing electric and magnetic fields.

2. Travel at the same speed (3x108 m s−1).

3. Can travel through a vacuum.

4. Can be reflected.

5. Can be refracted.

6. Can be diffracted.

The only difference between visible light and the rest of the EM Spectrum is the energy of each section (which varies proportionally with Frequency).

The table below gives key information about each part of the EM Spectrum:-