Just look at the white light across a prism.
Then its seven colors appear like a rainbow:
red, orange, yellow, green, blue, indigo, violet .
If light strikes in opaque objects is absorbed or reflected.
The reflected rays are what give color to each object.
In this great video you can see the range
of colors that nature has on his palette.
Life Is Colourful from The Brooklyn Brothers on Vimeo.
The reflected rays reach the eye.
After they they transmit the image to the brain.
This drawing that looks like a blowfish
is our eye inside.
The light phenomenon is amazing.
Playing with lenses and mirrors also you'll discover many things.
Finally fun stuff by Donia Liechti.