Green Lion Red Lion Alchemy
|Aniline Purple Dye||66023C||102||2||60|
The visible red light has a wavelength of about 650 nm. At sunrise and sunset, a large amount of blue and violet light are removed as a result of scattering and colours, such as red and orange, are more visible.
- The red colour of leaves is due to a class of pigments, occurring in leaves and known as anthocyanins. Anthocyanins absorb blue, blue-green, and green light. Therefore, the light reflected by leaves containing anthocyanins appears red. They are responsible for the red skin of ripe apples and the purple of ripe grapes.
- Chromium impurities colour various gemstones: they are deep red in ruby but sea-green in emerald, because the crystal field is significantly stronger in emerald than in ruby.
- Some stars appear red in colour including Betelguese.
- Mars is the red planet.
- According to the ideas of alchemy the Philosopher's Stone is named the Red Lion.
- The Impressionist painter Claude Monet captured the dramatic effect of light on landscape in the painting Autumn at Argenteuil.
- Landscape artist J.M.W. Turner captured the intense lighting tones seen as the sun sinks into the Thames Estuary on the canvas of The Fighting Téméraire tugged to her Last Berth. The iodine scarlet pigment has faded with time but the sympathetic lighting conditions enhance the overall mood, notwithstanding.
- Pink skies of Rococo artist Giovanni Battista Tiepolo are a fair representation of light scattered at dawn.