September 2017
Intermediate to advanced
216 pages
5h 30m
English

Light is the source of all color and our sense of sight functions only when light reaches the eye. There is no perceptible color without natural or artificial light. Poetically put, light is the messenger and color is the message.
To see fine details precisely, the eye contains a lens that can focus light onto the sensitive cells within the retina, triggering nerve impulses connected to the brain, where a visual image is formed. There are two types of light sensitive cells called rods and cones. Rods work in dim light, while ...