why is the colour of the sky blue?

Question

why is the sky blue why not red or purple ? And what makes the grass green ?

Answer 1

1. The color of the sky is blue because the atmosphere scatters shorter wavelenght light (blue and violet) more than longer wavelength light (red), and thus we see more of the scattered blue light.

For more,

http://en.wikipedia.org/wiki/Diffuse_sky_radiation

2. Grass is green because all green plants contain chlorophyll. Chlorophyll is a pigment found in green plants that absorbs best at around 700nm (red color) and poorly at around 500nm (green). Hence, it reflects green light most, and that is why we see plants as green.

http://en.wikipedia.org/wiki/Chlorophyll

Answer 2

The sky is blue because white light from the sun refracts as it enters the earth's atmosphere, much like light refracts through a prism. During the day, especially mid morning and mid afternoon, the blue part of the refracted light reaches the surface. Towards sunset, when the light hits the atmosphere at a shallower angle, mostly red part of the spectrum reaches the surface, hence red sky at sunset.

The sky isn't blue because it's reflecting the colour of the sea. If this is true, the sky would be green over the Amazon and permanently orangey red over the Arizona desert.

It's the other way round - the sea looks blue because it's reflecting the colour of the sky.

Answer 3

The sky is blue because the normally invisible to eye microscopic particles of dust and other particles that make up our atmosphere, when hit by the sun's rays, light up and reflect a single color from the sprectrum, due to the type of light that it is shining. Grass is green because of the photosynthetic processes, it absorbs light, and produces it's own food, which makes it a green color. If you look at the very inner base of a blade of grass, it is white, because photosynthesis does not occur there.

Answer 4

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue

Grass is green due the chlorophyll pigmentation

Answer 5

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

Answer 6

1. It is the interaction of sunlight with air. The actual reason is so called Raleigh scattering. The sky changes color depending on the angle of the sun in the sky.
2. Grass and other plants are green because of green cellular organelles called chloroplasts in the leaves. They are used for photosynthesis.

Answer 7

It is the reflection of light at a particular range in the spectrum of light. Why it is a particular color and not another can't really be answered. It just does. And grass is green because of chlorophyll, and that reflects green when light hits it.

Answer 8

The sky is blue becaue air molecules in the sky act as tiny resonators that scatter blue light.

Answer 9

The sky is blue because it is like a mirror. It reflects the color from
the blue ocean, in simple terms. The grass is green because of
a chemical called clorophyll ( I don't think I spelled it right, check the dictionary).

Answer 10

its blue because the wavelength of the color blue is shorter than most colors & is absorbed by the gas molecules that make up our atmosphere, the absorbed light then scatters in different directions, makin you see the sky as blue.