Is the sky an optical illusion? When the sun shines it emits white light but that white light is in fact made up of many different colours which we can’t see from where we are and when dust particles in the upper atmosphere catch the light they make it scatter in all directions. Because it scatters the most and moves faster, blue light is what we see when we look up at the sky.
By bringing the sky in, the interior space changes. The experience of the space alters, it becomes illuminated and the movement suddenly disrupts the stillness inside. There is a feeling of looking out, and of escape.
“But I never saw a man who looked with a wistful eye upon that little tint of blue which prisoners call the sky”
The Ballad of Reading Gaol, Oscar Wilde