2007-01-27 11:52:05 · 4 answers · asked by naenae 1 in Science & Mathematics ➔ Physics
The light must travel from the source, reflect off the paper (and surroundings) and then go to your eyes.
2007-01-27 11:59:35 · answer #1 · answered by emsjoflo 2 · 0⤊ 0⤋
The light travels from a light source to the sheet of paper. The paper absorbs some of the light, dependent on its colors and reflects others. A green object absorbs most of the color spectrum except for the color green. This light is then reflected back into the environment. Part of this light reaches the human eye.
Light enters the human eye via the lens. In humans the lens is shaped to magnify and direct that light onto the retina. Since only one lens (the cornea) is used the image appears upside down on the back of the eye. In the area where the light is focused are specialized optic cells called rods and cones. These cells interpret the brightness and darkness or the color. When a cell is stimulated it sends a signal through the optic nerve to the brain. There the brain does its image processing by combining the single cells readings into one image and then flipping that image so what we perceive is right side up.
The pupil is a hole in the iris that lets the light pass into the eye. The iris is a shield that increased or decreases with the amount of light present.
NOTE: The eye of the octopus is the closest match to the human eye in the rest of the animal kingdom.
2007-01-27 20:20:04 · answer #2 · answered by Dan S 7 · 0⤊ 0⤋
Light has to come from whatever light source you have, then bounce of your desk and the paper and then through the cornea, aquious humor, and pupil of your eye, for you to see.
2007-01-27 19:59:24 · answer #3 · answered by Jack 2 · 0⤊ 0⤋
Light from lamp (or sun) bounces off walls, trees and the paper (in any combination) and whatever was not absorbed hits your eye.
2007-01-27 19:59:01 · answer #4 · answered by Scooter_MacGyver 3 · 0⤊ 0⤋