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2006-12-10 00:28:42 · 6 answers · asked by HARISH KUMAR R 1 in Science & Mathematics Physics

6 answers

RODS and CONES are the light-sensitive cells inside the RETINA. They are called photoreceptors. They contain special pigments that are light-sensitive. When these cells detect light coming into the eye, they send a message back to the brain, which, in turn, translates the message into what we see. Rods and cones got their names because of the shape of the cells.
There are approximately 125 million RODS in each eye. Most of the rods are in the peripheral, or side, areas of the retina. They are responsible for gross detection of movement, shapes, light and dark. The vision that we obtain from rods is "black and white". They cannot detect color.
Color vision and detailed vision come from the CONES. There are about 6.5 million cones in each eye. They are concentrated in the center of the retina. At the retina's very center, the fovea, there are 150,000 cones in every square millimeter.
Although the cones provide us with color vision, they are not as light sensitive as the rods. In dim lighting, we rely on our rods for vision. This is one reason why it is hard to tell the color of an object in a darkened area.

2006-12-10 00:34:04 · answer #1 · answered by G.V. 6 · 0 0

We do N O T see black in the darkness, we just don't see any light, that's it. "dark" does not equal "black".

2006-12-10 08:32:45 · answer #2 · answered by jhstha 4 · 2 0

we see black in the darkness because there is no light.

2006-12-10 08:32:07 · answer #3 · answered by harhar 1 · 1 1

Because blackness is the lack of light. Color represents light. Blue light has its own wavelength, as does red ligt, green light and all the other colors in the visible spectrum of the overall electromagnetic spectrum (link). If there is no light, there can be no color, if there is no color, there is blackness.

Blackness is the lack of color....lack of light.

2006-12-10 08:35:54 · answer #4 · answered by Anonymous · 1 0

simply because 'dark' means no visible light....darkness is the absence of light...it is there where there si no light
when there is no light at all...there it is black...black is simply the absence of colour of each kind(VIBGYOR)

2006-12-10 08:45:44 · answer #5 · answered by catty 4 · 1 0

because its too dark.

2006-12-10 08:52:51 · answer #6 · answered by fatpeople_atemy_family 2 · 1 0

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