why is the sky blue?

Answer 1

Because blue has the shortest wavelength out of all the colours, it gets scattered more by the particles in the atmosphere e.g oxygen and nitrogen. Thus the colour we see is blue. If we did not have any atmosphere, the sun would just look like a star in a black sky.

At a sunset, the sky can look red/orange. This is because the sunlight is coming in at an angle and so it takes longer for the light to travel to your eyes. because of the distance it travels, the blue rays have been scattered a lot more than the red rays and so they have pretty much been depleted leaving the red colour.

It is NOT a reflection of the blue in the sea!

have a look at http://www.sciencemadesimple.com/sky_blue.html

Answer 2

Einstein answered this question. It has to do with the way sunlight is scattered by the molecules in the atmosphere. Blue light scatters more than red (Tyndall effect also known as Rayleigh scattering), so more blue light reaches our eye.

There is an excellent description at the website listed below (look at the cartoon and it will be pretty clear).

It is not a reflection from the ocean. And it isn't just water molecules that cause the effect.

Aloha

Answer 3

Because when the light from the sun reaches Earth, it is refracted. The atmosphere is like a prism; the light that is bent most becomes violet, and that which is bent least becomes red. At night, if you look directly up, the light seems dark purple, this is because it is bent the most. If you look at the horizon, it looks yellow, or even red, as it is bent least.
Another theory is that because of the size of the particles, and the way they are arranged in the gas, they reflect blue light. This is the same principle as to why CDs reflest in different colours.
Yet another is that the combination of gases absorbs photons, and re-emits photons of the blue wavelength.

Answer 4

the vapour from the earth goes up to form clouds in the sky and tain its colour to blue because blue does not reflect back by the particles in the atmosphere as much as the other colours.

Answer 5

It is the dust in the air and the light shinnies through it and it looks blue.

Answer 6

It is a perception from our vantage point. It has to do with the particles in the atmosphere that allows the ultra violet rays to filter in.

Answer 7

Isn't it something to do with the light reflecting off of all the water on our planet or something??

Answer 8

it has no atmosphere . If you go to a party with no atmosphere are you not blue

Answer 9

It really isn't blue

Answer 10

cuz the sun re-flks off the watter and the ocean