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2006-07-17 04:13:50 · 9 answers · asked by capacitor 1 in Computers & Internet Internet

9 answers

a shadow--blocks out all light-hence making it appear "dark"

2006-07-17 04:16:35 · answer #1 · answered by gemini~~~marie 3 · 1 0

A shadow is a region of darkness where light is blocked. A shadow occupies all the space behind an opaque object with light in front of it. The cross-section of a shadow is a two-dimensional silhouette, or reverse projection of the object blocking the light.Thats why its black
If white light is produced by separate colored light sources, the shadows are colored.

Illuminate a room with a red light, and the shadows are exclusively gray, or dark. Illuminate the shadows with a white light, and the shadows are green. Where both lights are blocked, or in other words where the shadows intersect, the shadows are gray. Away from the intersection, where the red light is blocked the shadows are green, and where the white light is blocked the shadows are red. In other words, light colors shadows or brightens them, according to the complementary color of the light blocked to cast the shadow. In the case of white and red lights, the complement of white is red; with white and green lights, the complement of white is green.

In the absence of multiple light sources, colored lights illuminate spaces where other lights are not blocked. In the above example, the red shadow cast by blocking white light is not a shadow with the white light off, but it is illuminated in red.

In the absence of white light, colored lights blocked by an opaque surface cast shadows in the colors complementary to the lights blocked. For green light, red shadows, and vice-versa; blue, orange; yellow, purple; intermediate light, intermediate shadows.

2006-07-18 17:43:55 · answer #2 · answered by Anonymous · 0 0

First of all, shadow is not "black". It's a darker version of the original color. Why? Because the shadow it's the result of a body that's obstructing the light!

Theory of color tells us: black is the absence of light!

2006-07-17 04:19:04 · answer #3 · answered by Karin 4 · 0 0

White light holds all colors, in the absence of light, IE "a shadow" the only thing that remains is black or the absence of color.

2006-07-17 04:18:39 · answer #4 · answered by notfan_football 3 · 0 0

The color of an object is determined by the frequency of light reflecting off it and hitting your retina. Black absorbs all frequencies of light. Therefore, a shadow, where there is no light to reflect, appears black.

2006-07-17 04:16:02 · answer #5 · answered by triviatm 6 · 0 0

it's not really a color so much as it is the LACK of color. no light is going to the shadowed area so it's dark..

2006-07-17 04:16:27 · answer #6 · answered by Johnny Blaze 3 · 0 0

It's actually grey due to lack of light.

2006-07-17 04:15:43 · answer #7 · answered by Justsyd 7 · 0 0

do you mean why is it called that?
just a name i think?

2006-07-17 04:15:18 · answer #8 · answered by Linnie 5 · 0 0

no light that was a dumb question

2006-07-17 04:15:25 · answer #9 · answered by Anonymous · 0 0

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