Ok. So we know why the sky is blue, but why is space black
[From: ] [author: ] [Date: 11-12-06] [Hit: ]
granular details and motion.If only rods are activated, you only see in grayscale.This is why the sky looks black to the human eye at night.Is it infinite? I cannot answer that question.......
Black is the DEFAULT image of zero incident light.
Space itself doesn't have a significant atmosphere. It is empty unless otherwise specified.
Earth has the atmosphere, and Earth's atmosphere is what scatters the sun's light to make the daytime sky blue.
You might think the light of the stars would be enough to make the nighttime sky blue. And in a sense, it can make it slightly blue. Try taking a a digital photograph at night, and then enhancing the color just right. Tweak the brightness, contrast, and saturation, and see if the sky background can ever become a blue color. It will if your camera had sufficient dynamic range to capture it.
Your human eyes however aren't sensitive to colors if there isn't enough light. This is due to your eyes having two light reception cell types: rods and cones. Cones sense the color when light levels are high. Rods don't sense the color, instead they focus on intensity levels, granular details and motion. If only rods are activated, you only see in grayscale. This is why the sky looks black to the human eye at night.
"Is it infinite? "
I cannot answer that question. No one knows for sure.
What is infinite?
Infinite means unbounded, such that no matter how far you think you can go, there is always just one more step to still fit within the value of interest. Whatever number you think is the highest number, I can always add one to it to make an even higher number. That is what we call infinity.
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Because light moves in straight lines unless something scatters it. If there isn't a light source in the direction you're looking it isn't going to be anything but black. The sky is a light source as it scatters light from the Sun. The vacuum of space doesn't scatter, refract or reflect light.
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We can't see the blueness of the sky at night because the sun isn't on your side of the world. If you look at pictures of the Sun, you'll notice the part around it is orange and not blue. The sky is blue because of our atmosphere. Yes the universe is infinite,
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Space is basically an area in a vaccum like medium! No life can exist in it as there isn't an atmosphere in it! Hence the name Space!
Absence of light brings about darkness or just black! It is infinite, as it is expanding everyday!
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black is the absence of all other light. space is just dark, but it is relatively full of stuff, so not empty. it is infinite because it is ever changing, and is therefore, not finite, or specific.
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it's lack of light. the light cannot reach us, and is taken in by gravitational fields we cannot see (brown dwarfs, for instance) until there is no more light left to see.
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black is the absence of light, so in a sense it is nothingness.
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They ran out of blue paint ......
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