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Wednesday, 17 July 2013

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Colors Desktop Wallpapers Biography

Source(google.com.pk)

Color is the byproduct of the spectrum of light, as it is reflected or absorbed, as received by the human eye and processed by the human brain. It's also a great design element! The world is full of light. Visible light is made of seven wavelength groups. These are the colors you see in a rainbow: red, orange, yellow, green, blue, indigo, and violet.

When light hits objects, some of the wavelengths are absorbed and some are reflected, depending on the materials in the object. The reflected wavelengths are what we perceive as the object's color. Our eyes are the input channels, if you will, for this light. One portion of the eye is called the retina and it contains four types of light sensors. First are the rods, which record brightness and darkness and from which we "see" a sort of coarse sketch of the world. Next are three types of cones, each one optimized to absorb a different spectrum range of visible light. One set of cones absorbs long wavelengths, the reds. Another absorbs mid-size wavelengths, the greens. The third absorbs short wavelengths, the blues. Together, these rods and cones gather the information that our brain then processes into one combined image.The color of a star is related to the color of light that it gives off. Light is a wave - a cycling motion that travels through empty space. When a star emits a light wave, the wave can travel across empty space to the Earth, where we see the star's light. Light waves, like waves in water, can be described by the distance between two successive peaks of the wave - a length known as the wavelength. Different wavelengths of light appear to our eyes as different colors. Shorter wavelengths appear blue or violet, and longer wavelengths appear red.