why is the sky blue?

Answer 1

Like a rainbow, the sunlight is made up of many colours.
Blue is the fastest, red is the slowest.
EXAMPLE: time a group of kids in running. Give blue t-shirts to the fastest half, red to the slowest.
When they run towards you, it looks like a group of blue clad kids running.
When they are going away from you, the group looks red shirted.

Likewise, when the sun is highest in the sky, the blue comes through first. At dawn and dusk, the sky looks red

Blame it on the rainbow spectrum

Answer 2

Refraction of light in the sky.

Blue is slower than red.
So as the light shoots past from the sun, the red light travels straight past while the blue remains visible to us, and since light is constantly filtered to the earth during the day; it is constantly blue.

When the sun sets, and notice the sky turns orange sometimes because the sun is at a different angle that we can see the red light across the atmosphere.

Answer 3

It is because of the water vapor in the atmosphere. But, some people say that it is because of the reflection of the ocean that's why the sky is blue.

Answer 4

Reflection of the ocean onto the upper atmosphere?

Answer 5

Reflection of ocean water