Why is the sky blue? Why is space dark with so many suns and you can not see a bear of sun light in space?

Answer 1

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.


Because the universe is not infinitely old, that puts a limit to how long the
light from all those stars can have travelled. So some of the light has not
gotten here yet. Because stars do die out, that means that their light dies
out too - which means that we may get the light from some stars at one time,
and the light from some other stars at a different time, but not all the
light
of all the stars that everywhere put together. Finally, because the
universe is
expanding, the light gets weaker before it gets to us. All in all, this means
that there is not enough light from all those stars to make any point in
space
bright.

Answer 2

The sky is blue because particles in the atmosphere scatter sunlight towards the ground - blue light is scattered more. Without an atmosphere the sky would be dark all the time (like it is on the moon).

Space is dark because the universe had a creation date - it is not infinitely old.

While we do not know if the universe is finite in space (it may well not be) we do know that it had a beginning at the big bang. This, coupled with the fact that the lifetime of a star is not infinite, means that the universe visible from earth is not infinite - if it was, the sky would be light (it would not matter if there was stuff in the way of the start, because the stuff would heat up and radiate as much energy as the stars in the end).

Answer 3

There is a physical phenomenon called Rayleigh scattering that causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere the color blue is scattered much more efficiently than the other colors.

So when you look at the sky on a clear day, you can see the sun as a bright disk. The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you. (Because red light, yellow light, green light and the other colors aren't scattered nearly as well, you see the sky as blue.)

The reason that space is dark is because of the vast distances between the light sources. There is no atmosphere in space to diffuse the light. Light actually consists of all of the colors for the visible spectrum, but it takes some filter to see the specific colors.

Answer 4

The sky is blue do to the reflection of the sun's rays. The sun emits a wide array of energy across the electromagnetic (which visible light is part of) spectrum. The visible light comes at the earth and gets scattered as it comes through the atmosphere, the smaller wavelength light which is blue gets scattered more and makes the sky look blue.

Space looks dark because even though there are so many stars and planets, they are millions of miles away. The light does not reflect off of anything (and if it does the light is reflected off the surface opposite what we see) so does not appear to be as large. The distance causes the other suns to act like point sources of light, such as a flashlight, compared to a ball of light similar to what our sun acts as to earth.

I assume the beam you ask about is like the effect of spot lights at a concert. The reason you can see the beam of light is the light reflecting off of moisture or dust in the air. In space there is no atmosphere and hence no moisture or dust (or at least not as a dense a collection of moisture and particles). Therefore light beams cannot be seen in space.

Answer 5

the sky is blue because of the reflection of the the light of the sun on water. The space is dark because it doesn't have a atmosphere and so we can't bear sunlight because it is not controlled.

Answer 6

why is the sky blue? (this has already been answered).

whay is space dark?- space is dark, because it is empty and thus light has no surface to bounce off except for other planets which reflect light produced by the stars. this is unlike our own atmosphere, in wich when you turn on a light inside a room, the whole room becomes bright and this is because in our atmosphere is not empty, but instead has many substances in it that reflect the light and thus the room becomes bright.

good luck.

Answer 7

The sky is blue because of the sun's rays being refracted in the atmosphere. Space is dark because it doesn't have any light...

Answer 8

The distance between the stars is so great that the light is diffused over the distance. If we lived on a planet in a star cluster, for instance, the sky would be much brighter because the stars would be much closer together.

Answer 9

The sky is blue because light refracts to that end of the spectrum due to the oxygen nitrogen content.

Space is dark because it is mostly empty with nothing for the light to reflect from.

Answer 10

because the blue effect is the sun bouncing off the water .... space is dark due to the absence of light. the sun is reflective to only things that it will reflect off of. example the moon