On a perfectly clear day, why does the sky look light blue, and then at night, it looks black?

And one can see the stars.However, in the day light, one cannot...So it's kinds like two questions. 1.) Why can't one see the stars in the day light? and 2.) Why does the sky look blue in the day time and black/clear at night?? Always wondered that question....hummmm.Well, Thanks in Advance!On a perfectly clear day, why does the sky look light blue, and then at night, it looks black?
The sky reflects the ocean, therefore it looks blue. The ocean reflects the sky, therefore it looks blue as well. At night the sky appears black because there is no light reflecting off the ocean, therefore you can see the stars.On a perfectly clear day, why does the sky look light blue, and then at night, it looks black?
The sky is dark at night because there is no light and the air is transparent. In the daytime, the gases that make up the air do not absorb the blue wavelengths as much as they absorb red. Blue light is scattered and we see this on the surface of the earth.





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Its the effect of polarization .


The visible spectrum is composed of various electromagnetic waves .these when traveling through the atmosphere get subject to polarization, thus at a perfectly clear day the sky looks light blue.





Polarization by scattering is observed as light passes through the atmosphere. The scattered light produces the brightness and color in clear skies
The sky is an optical illusion that results from the bright light of the sun scattering off the dust particles and water droplets suspended in the atmosphere.





As the blue end of the visible light spectrum has more energy than the red end, the red, orange, yellow, and green areas of the spectrum are more fully absorbed, and the blue is scattered.





At night, when the sun is not glaring off of every dust particle and water droplet in the atmosphere, the atmosphere becomes transparent, and you can see out into space.





A NOTE to other answerers. The sky is NOT REFLECTIVE and it most emphatically is NOT blue because it ';reflects the oceans.'; That is a stupid answer, and will everyone please stop it.





If the sky were reflective, it would reflect cities, fields, forests, and highways. Why would the sky be light blue when the oceans are a dark blue-gray? And why would the sky in the middle of Iowa be light blue? Wouldn't it be the color of the cornfields? So go figure, and quit posting answers about things you know nothing about!!!!
You cant see the stars because the brightest %26amp; closest one (the sun) is making the sky too lighted. It's black at night because the sun is shining on another part of the planet
The light spectrum is organized from larger wavelengths to smaller wavelengths, ROYGBIV, respectively. When this light enters the earth's atmosphere, the longer wavelengths are not affected and pass right through, but the shorter wavelengths are often absorbed by the gas molecules in the air. Because your eyes can recieve and recognize these wavelengths, the sky appears to be blue. At night, when there is no light coming from the sun's rays, the sky appears black, because black is the absence of light or color.


You cannot see the stars during the day for the same reason that a flashlight does not appear to be as bright during the day and that less stars are visible at night in the larger cities than out in the country. During the day, the rays of the sun which are far stronger, closer, and more accurately aimed towards earth drown out the visiblity of the stars. Whereas, at night, the moon's rays (even though the moon is closer to earth than the sun) are far fewer due to the small size of the moon, and the moon is not a source of light but rather an object that reflects the light of the sun. Therefore, the rays of light from the moon are not strong enough to fully overpower the lights of the stars, except perhaps those closest to it.
because of the sun
WTF!
Check out this website:





http://www.sciencemadesimple.com/sky_blu鈥?/a>





It answers your questions and a few more you might find interesting.
Refracted light from the sun upon the atmosphere causes the blue sky (someone else could come up with a more in depth scientific explanation for that but that is the most basic and easiest answer).





The sunlight is far to bright to allow us to see any stars or celestial object other than the moon and sometimes Venus. (if you know when and where to look)Luminosity of objects is measured in a scale of magnitude. From memory the Sun is at -27 and to moon at -12to14(something like that). At its brightest Venus can reach -4.9.





Many centuries ago, again from memory I think it was in the year 1056, there was a very bright supernova that shone brightly and could be seen during the daylight.





I could be wrong with all that though as I was only going by memory and have not had time to go back and research it - I know I should have!!
In the day time the sun's light beams hits the atmosphere and it absorbs all the light particles and we see light blue because that is the majority of what is lost in the atmosphere. You can't see the night sky because the sun is so bright. At night the sun is on the other side of the earth. So if there was no star in the sky we would see dark sky all the time.