Design Futures

A light wave is energy in the form of electric and magnetic fields that vibrate at right angles in the direction of the movement, it travels through electromagnetic waves in a vacuum, which we see as the colours of the rainbow. Each colour has different wave lengths but when they are all together they make a white light. you can see on the picture below that red has the longest wave length and violet has the shortest.

When we see a light our eyes produce the colour depending on the wavelength of the light wave. The reason red, green and blue are primary colours as when they are added together they make a white light.

But light is only on small part of the electromagnetic system.