Electromagnetic Spectrum

Visible light falls in the middle of the Electromagnetic Spectrum.

Light energy is made up of many frequencies and wavelengths of which visible light is only a very small part.

Visible light falls between Infrared and Ultra violet.

The rest of the Electromagnetic spectrum is made up from other waves and energy including Radio Waves and X-Rays.

Visible light is part of the electromagnetic spectrum

Light travels in waves - electromagnetic waves.

These waves are vibrations of electric and magnetic fields that pass through space.

In physics, the visible spectrum has three primary colours - Red, Green and Blue. Chemically, colour is derived from pigments and compounds and the three primary colours here are Red, Yellow and Blue. Any of these two colours will give a third colour - a secondary colour.

The sensory aspect of colour is visual and deals with the physiology and psychology. So here we see the two above systems in the perception of sight and there are then two combinations of three primaries, i.e. Red, Yellow and Blue and Red, Blue and Green. All other colours are derived from these.

The diagram below, shows what a small part of the whole electromagnetic spectrum visible light actually forms.

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