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Why is the sky blue and the grass green?
I have heard that the sky is blue because it is a reflection of the ocean, and the grass is green because of the clorofil, but i just want some more info on the topic.
The atmosphere around the Earth is largely made up of two colorless gases: oxygen and nitrogen. Red and blue light reacts very different from each other to oxygen. Because the wavelength of blue light is roughly the size of an atom of oxygen, blue light interacts with the oxygen and is scattered by it, while red light, with its longer wavelength, goes right pass the oxygen atoms. If the Earth had no atmosphere, the sun’s light would travel directly from the Sun in a straight line towards our eyes and we would see the Sun as a very bright star in sea of blackness. But because the Sun’s blue light is scattered by the oxygen in the atmosphere, blue light from the Sun enters our eyes from all sorts of different angles and we see the entire sky as blue. The atmosphere scatters violet light even more effectively, but our eyes are more sensitive to blue. Wherever we look towards the sky, some light is bouncing off an oxygen atom and entering our eyes, making the sky appear to be blue.
Like many plants, most species of grass produce a bright pigment called chlorophyll. Chorophyll absorbs blue light (high energy, short wavelengths) and red light (low energy, longer wavelengths) well, but mostly reflects green light, which accounts for your lawn's color.
 Birth Of The Blues/Blue Skies - Double Feature Sale Price: $14.98  Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionIt's a flimsy excuse to romp through more than two dozen Irving Berlin songs, but Blue Skies is good fun nonetheless (and one of the top-grossing films of 1946). Bing Crosby is a restless nightclub entrepreneur, Fred Astaire his Broadway buddy, Joan Caulfield the woman they both want...  |
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