Contemporary Seascape Painting by Tandy Pengelly

The enchanted purple skies!

Light is white, but when you put it through a prism, you see all the different coloured light waves in the spectrum: red, orange, yellow, green, blue, indigo, and violet. Light travels in waves, sometimes in short dippy ones and other times in long lines with lots of peaks. Light will travel in a straight line unless something gets in its way, like a prism or molecules in the atmosphere. Gases and particles in the atmosphere scatter light, and since blue travels on shorter, smaller waves, it causes charged particles to move faster, scattering more light. So we see more blue than we do red because blue gets particles worked up more than the other colours. But Violet is always there, but we don't detect it as well as we do blue, so blue wins the light wave battle for our eyes. The right conditions have to be met for purple, or violet, to be visible.

Because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes. If the path is long enough, all of the blue and violet light scatters out of your line of sight.

When certain special conditions come together....we have a purple sky.

30cm by 30cm Oil Painting

Cotton stretched canvas

Varnished and protected

Wooden neutral frame ready to hang

Price: 164 euros